Distilling Vocabulary Quiz

A still is the vessel used to distil alcohol by heating a fermented liquid, evaporating the alcohol, and condensing the vapour. The two main designs are the pot still, used in batches for richer, more characterful spirits such as malt whisky and many rums, and the column (or continuous) still, used for high-volume, high-purity production of grain spirit and vodka. Many distilleries combine both to achieve a target flavour and strength.

Distillation exploits the fact that alcohol boils at a lower temperature (about 78°C) than water (100°C). When the fermented wash is heated in the still, the alcohol and aromatic compounds evaporate first. These vapours rise, pass into a cooled condenser, and turn back into a concentrated liquid. By controlling temperature and timing, the distiller separates the desirable spirit from unwanted compounds.

The mash is the porridge-like mixture of milled grain and hot water in which enzymes convert starches into fermentable sugars. Once the sugary liquid is drawn off and yeast is added, fermentation produces the wash — a low-strength, beer-like liquid of around 7–10% alcohol. In short, the mash creates the sugars, and the wash is the fermented alcohol that goes to the still.

During distillation the spirit is divided into three fractions. The foreshots (heads) come off first and contain harsh, volatile compounds like methanol; they are discarded. The hearts are the clean, central portion that the distiller keeps. The feints (tails) come last and contain heavier, oily compounds. Deciding exactly where to make the cuts between these fractions is one of the most skilled judgements in distilling.

Maturation transforms raw, fiery new-make spirit into a smooth, complex drink. As the spirit rests in an oak cask, it draws colour and flavour compounds — vanilla, caramel, spice — from the wood, while harsh elements mellow and a small amount evaporates (the 'angels' share'). The type of cask, its previous contents, the climate, and the length of ageing all shape the final character of the spirit.

ABV (alcohol by volume) states the percentage of pure alcohol in a drink and is the standard measure used on modern labels. Proof is an older measure of strength: in the US system, proof is exactly twice the ABV (40% ABV = 80 proof), while the historical UK system used a different ratio. Today ABV is the precise, internationally recognised figure, and proof survives mostly as a traditional term.

Blending combines spirits from different casks, ages, or distilleries to create a final product that is balanced and consistent from batch to batch. A master blender uses their palate to marry components so that the brand tastes the same every year, despite natural variation in individual casks. Blended Scotch whisky, for example, mixes malt and grain whiskies to achieve a signature house style.

The wash is the fermented liquid produced when yeast turns the sugars from the mash into alcohol. It resembles a strong, unhopped beer and typically reaches 7–10% alcohol by volume. The wash is then distilled — often more than once — to concentrate the alcohol into spirit. Its quality and the yeast used both influence the flavour of the final product.

The foreshots contain the most volatile compounds, which evaporate first because they have low boiling points. These include methanol, acetone, and other substances that are unpleasant in aroma and potentially toxic. To protect both quality and safety, the distiller cuts away the foreshots and either discards them or returns them to be redistilled with the next batch.

ESL learners interested in food and drink, hospitality, or the spirits industry should prioritise: still, distillation, mash, wash, foreshots, hearts, feints, cask, maturation, proof, blending, and ABV. These terms appear on labels, distillery tours, tasting notes, and trade literature, making them valuable for both professional and general English in a fast-growing global industry.