Distilling Vocabulary in English — 20 Essential Terms
20 key distilling words with definitions and example sentences — stills, fermentation, casks, and the spirit cut — for B2 ESL learners and craft-spirits enthusiasts.
Pedagogically reviewed by LexFizz Team
Distilling is the craft of separating alcohol from a fermented liquid by heating it, capturing the vapour, and cooling it back into a concentrated spirit. From Scotch whisky and Irish poteen to gin, rum, and vodka, distilling combines chemistry, tradition, and patient craftsmanship — and it carries a rich, specialist vocabulary that appears on bottle labels, distillery tours, and tasting notes. Imagine a distiller carefully judging the cut away from the foreshots as the still works through another batch of fermented wash — this is exactly the vocabulary you'll meet on a distillery tour.
The 20 terms on this page cover the whole production journey: the equipment such as the still and condenser, the early stages of fermentation and the mash, the crucial decisions of the cut between foreshots, hearts, and feints, and the long years of maturation in a cask. You will also meet measurement terms like proof and ABV, and the final stages of blending and bottling.
These words will help you understand distillery tours, read whisky labels, and discuss spirits confidently in English. For a fuller definition of any of these terms, see the Oxford Learner's Dictionaries. For related language, see our Brewing vocabulary, Wine vocabulary, and Chemistry vocabulary pages.
Word List
| Word / Phrase | Meaning | Example Sentence |
|---|---|---|
| still | the central piece of equipment in which a fermented liquid is heated so that alcohol vapour is driven off and then condensed; pot stills and column stills are the two main types | The distillery's copper pot still had been in continuous use for over a century, shaping the character of every batch of whisky it produced. |
| distillation | the process of heating a liquid to create vapour and then cooling that vapour to collect it, used to separate and concentrate alcohol from a fermented wash | Double distillation is the traditional method for Scotch malt whisky, while many Irish whiskeys are distilled three times for a smoother result. |
| fermentation | the biological process in which yeast converts the sugars in a liquid into alcohol and carbon dioxide, producing the low-strength wash that is later distilled | Fermentation in the washbacks took around three days, by which time the yeast had created a beer-like liquid of about eight per cent alcohol. |
| mash | the mixture of milled grain and hot water in which natural enzymes convert starches into fermentable sugars, producing a sweet liquid called wort | The mash was held at a carefully controlled temperature so the enzymes could break the barley starch down into sugar. |
| wash | the fermented, alcoholic liquid — similar to a rough beer — that is fed into the still for the first distillation | The wash had a low alcohol content of around eight per cent before it entered the first still to be concentrated. |
| spirit | the strong, distilled alcoholic liquid collected from the still; the term covers whisky, gin, rum, vodka, and brandy before and after maturation | The new-make spirit flowed clear and fiery from the still at around seventy per cent alcohol, ready to be filled into casks. |
| condenser | the part of the still where hot alcohol vapour is cooled and turned back into liquid, usually by passing it through coiled pipes surrounded by cold water | As the vapour reached the condenser, the cold water jacket cooled it rapidly, and the first drops of spirit began to trickle into the receiver. |
| reflux | the process by which some alcohol vapour condenses inside the still and falls back to be redistilled, producing a lighter, purer spirit; tall stills encourage more reflux | The unusually tall neck of the still increased reflux, giving the whisky a delicate, floral character rather than a heavy one. |
| cut | the act of dividing the flow from the still into the foreshots, the desirable hearts, and the feints, based on alcohol strength and aroma | Knowing exactly when to make the cut between the hearts and the feints is one of the most important skills a stillman can develop. |
| foreshots | the first part of the spirit run, high in volatile and undesirable compounds such as methanol, which is separated off and not used in the final product | The foreshots came off the still first, cloudy and harsh, and were diverted away to be redistilled in a later batch. |
| hearts | the middle and most desirable portion of the spirit run, clean and well-balanced, which is collected to become the finished whisky or other spirit | Only the hearts were channelled into the spirit receiver, as this was the pure, flavourful fraction worth maturing in oak. |
| feints | the final, lower-strength part of the spirit run, containing heavier, oilier compounds; like the foreshots, the feints are collected separately and redistilled | As the alcohol strength dropped, the stillman cut to the feints, which were saved and added to the next still charge rather than wasted. |
| cask | a wooden barrel, usually made of oak, in which spirit is matured; the wood and any previous contents, such as sherry or bourbon, strongly influence the final flavour | The whisky was filled into a former sherry cask, whose wood imparted rich notes of dried fruit and spice over the years. |
| maturation | the slow ageing of spirit in wooden casks, during which it absorbs flavour and colour from the wood and harsh compounds mellow into a smoother character | Maturation in a damp Scottish warehouse allowed the spirit to develop complexity that simply cannot be rushed. |
| barrel | a rounded wooden container, typically of oak, used to age and store spirits; in the spirits trade the words barrel and cask are often used interchangeably | American bourbon must by law be aged in a new, charred oak barrel, which gives it its distinctive vanilla and caramel notes. |
| aging | the period during which a spirit rests in wood to develop flavour, colour, and smoothness; the stated age on a label refers to the youngest spirit in the bottle | After twelve years of aging, the single malt had taken on a deep amber colour and a wonderfully rounded flavour. |
| proof | a traditional measure of the alcoholic strength of a spirit; in the United States, proof is exactly twice the percentage of alcohol by volume | A bourbon labelled one hundred proof contains fifty per cent alcohol by volume, making it considerably stronger than a standard bottling. |
| ABV | short for ‘alcohol by volume’, the standard international measure stating what percentage of a drink is pure alcohol | Most bottled whiskies are released at forty per cent ABV, although cask-strength editions can exceed sixty per cent. |
| blending | the skilled combining of spirits from different casks, ages, or even distilleries to create a consistent and harmonious final product | The master blender drew samples from dozens of casks, blending them carefully until the flavour matched the brand's signature profile. |
| bottling | the final stage of production, in which the matured spirit is diluted to the desired strength, filtered if required, and filled into bottles for sale | Before bottling, the whisky was reduced with pure spring water to bring it down from cask strength to the standard forty-six per cent. |
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Frequently Asked Questions
What is the difference between distillation and fermentation?
Fermentation and distillation are two separate stages of making a spirit. Fermentation comes first: yeast converts the sugars in a liquid into alcohol, producing a relatively weak, beer-like wash of around five to ten per cent alcohol. Distillation comes afterwards: the wash is heated in a still so that the alcohol vapourises, is cooled in a condenser, and is collected as a much stronger spirit. In short, fermentation creates the alcohol, while distillation concentrates and separates it.
What does the ‘cut’ mean in distilling?
The cut is the moment a distiller decides which part of the spirit run to keep. As liquid flows from the still, it changes in strength and aroma over time. The early flow, the foreshots, contains harsh and even toxic compounds and is set aside. The middle flow, the hearts, is clean and flavourful and is collected for maturation. The final flow, the feints, becomes oily and weak and is also separated off. Making accurate cuts between these fractions is one of the most important judgements in distilling and directly shapes the quality of the final spirit.
What is the difference between proof and ABV?
Both proof and ABV describe how much alcohol a spirit contains, but they use different scales. ABV, meaning ‘alcohol by volume’, is the international standard and states the percentage of pure alcohol directly — for example, forty per cent ABV. Proof is an older system that varies by country. In the modern United States, proof is simply double the ABV, so a spirit at fifty per cent ABV is one hundred proof. Today most labels show ABV, but proof still appears, especially on American whiskey.
Why does maturation in a cask matter so much?
Maturation in a wooden cask transforms raw, fiery new-make spirit into a smooth, complex drink. As the spirit rests in oak, it slowly draws colour and flavour compounds from the wood, while harsh elements evaporate or break down. The previous contents of the cask — sherry, bourbon, or wine, for example — also leave their mark. Temperature and humidity in the warehouse affect how quickly the spirit ages. For many whiskies, the cask contributes the majority of the final flavour, which is why distillers value good wood so highly.
What is a pot still and how does it differ from a column still?
A pot still is a simple, often copper, vessel that distils one batch at a time. It produces a flavourful, characterful spirit but requires two or three separate distillations to reach the desired strength, so it is favoured for malt whisky and many traditional brandies. A column still, also called a continuous still, works without stopping and can produce a very high-strength, lighter spirit in a single pass. Column stills are used for grain whisky, most vodka, and large-scale rum. Pot stills emphasise flavour; column stills emphasise efficiency and purity.
What are foreshots and feints, and why are they removed?
The foreshots are the very first liquid to come off the still during the spirit run. They contain volatile and undesirable compounds, including methanol, which are harsh and potentially harmful, so they are diverted away. The feints are the last liquid to flow, after the desirable hearts; they are lower in strength and contain heavier, oilier compounds that would make the spirit taste rough. Both foreshots and feints are collected separately and usually redistilled in a later batch, so very little is actually wasted.
What does reflux do to the character of a spirit?
Reflux happens when alcohol vapour partly condenses inside the still and falls back down to be distilled again. The more reflux occurs, the lighter and purer the resulting spirit becomes, because heavier compounds are left behind. The shape of the still has a strong influence: tall, slender stills create more reflux and produce delicate, floral spirits, while short, squat stills allow heavier flavours through. Distillers can therefore design or operate their stills to encourage or limit reflux and shape the final style of their whisky.
What is the difference between blending and bottling?
Blending and bottling are both finishing stages but serve different purposes. Blending is the creative work of combining spirit from different casks, ages, or distilleries to achieve a consistent and balanced flavour; a master blender may marry dozens of casks to match a brand's signature profile. Bottling is the practical final step in which the finished spirit is reduced to its target strength with water, filtered if necessary, and filled into bottles for sale. Not every spirit is blended, but every spirit is eventually bottled.
What is the mash and what role does it play?
The mash is the mixture of milled grain and hot water created at the start of whisky production. Holding it at a carefully controlled temperature allows natural enzymes in the grain to convert starches into fermentable sugars, producing a sweet liquid known as wort. This sugary liquid is then cooled and fermented with yeast to make the wash. Without a properly run mash there would be no sugar for the yeast to ferment, and therefore no alcohol to distil, so the mash is the essential foundation of the whole process.
What is the best way to learn distilling vocabulary in English?
The most effective approach is to connect the words to a real process. If you visit a distillery or watch a production video, label each step as it happens — mash, fermentation, distillation, the cut, maturation. Reading whisky labels and tasting notes in English exposes you to terms like ABV, cask, and aging in authentic contexts. Practise the 20 terms on this page with Flash Cards on LexFizz, then test yourself with the Matching Pairs exercise. Revisiting the words in different settings will help you remember them far better than memorising a list.