Quick Definition
Fastidious (adjective) describes someone who is very attentive to accuracy and detail, and hard to please because everything must be correct, neat, and clean. It is often used in the pattern "fastidious about".
Example: "He was fastidious about keeping his desk perfectly tidy."
What Does Fastidious Mean?
The word fastidious comes from the Latin fastidium, meaning "loathing" or "disgust" — the sense of being easily put off by anything imperfect. From that idea grew today's meaning: a fastidious person sets high standards and is quickly displeased by anything sloppy, dirty, or inexact.
In modern English, fastidious is a formal, high-value adjective with two shades. In its admiring use, it praises careful, precise attention to detail: a fastidious craftsman finishes every joint perfectly. In its critical use, it suggests fussiness and being over-particular: someone too fastidious to share a cup. The most common pattern is "fastidious about", as in "fastidious about cleanliness".
Key point: fastidious can be a compliment or a mild criticism, and the surrounding words decide which. Used of work, it usually admires precision; used of habits and tastes, it can hint that a person is hard to please.
Example Sentences
| Sentence | Level / Note |
|---|---|
| She is fastidious about keeping the kitchen spotlessly clean. | B2 — description / neutral register |
| He was a fastidious dresser who ironed even his socks. | B2 — character / neutral register |
| The restorer's fastidious attention to detail brought the painting back to life. | C1 — admiring / formal register |
| He was almost too fastidious to eat at a roadside cafe. | C1 — critical / literary register |
| The editor was fastidious about grammar, querying every misplaced comma. | C1 — professional / formal register |
Word Family
Adjective
fastidious
"A fastidious editor."
Noun
fastidiousness
"Her fastidiousness was famous."
Adverb
fastidiously
"He fastidiously checked it."
No verb form
—
Pattern: "fastidious about".
Synonyms & Antonyms
Synonyms
- meticulous — very careful and precise
- scrupulous — thorough and conscientious
- particular — insisting on standards
- finicky — over-fussy about detail
- punctilious — attentive to small points
Antonyms
- careless — not paying attention to detail
- slovenly — untidy and messy
- sloppy — lacking care or neatness
- easygoing — relaxed about standards
- indiscriminate — not choosy at all
Common Collocations
- fastidious about — "She is fastidious about hygiene."
- fastidious attention to detail — "His fastidious attention to detail showed."
- a fastidious eye — "She has a fastidious eye for colour."
- fastidiously clean — "The lab was fastidiously clean."
- fastidious in his habits — "He was fastidious in his habits."
- almost fastidious — "He was almost fastidious about punctuality."
Related Words
Practise This Word
Ready to make fastidious stick? Try these free LexFizz exercises — no sign-up required.
Frequently Asked Questions about “fastidious”
What does fastidious mean in English?
Fastidious means very attentive to accuracy and detail, and hard to please because everything must be correct, neat, and clean. A fastidious person checks every small detail and dislikes anything sloppy or untidy. For example: 'He was fastidious about keeping his desk perfectly tidy.' It can be admiring (careful and precise) or critical (fussy and over-particular), depending on context.
How do you pronounce fastidious?
Fastidious is pronounced /fæˈstɪdɪəs/ in British English. It has four syllables: fa-STID-ee-uhs. The main stress falls on the second syllable: STID. The first syllable is a short 'fa', the stressed second syllable rhymes with 'hid', and the ending '-ious' is said as a soft 'ee-uhs'. Say it slowly: fa... STID... ee... uhs.
What is the CEFR level of fastidious?
Fastidious is a C1 (Advanced) level word. It appears mainly in character description, reviews, and formal writing, where speakers describe someone who is meticulous about detail, cleanliness, or correctness. C1 learners are expected to use precise words like fastidious instead of only basic words such as 'careful' or 'fussy'.
What are synonyms for fastidious?
Synonyms for fastidious include: meticulous (very careful and precise), scrupulous (thorough and conscientious), particular (insisting on standards), finicky (over-fussy about detail), and punctilious (attentive to small points of correctness). When praising careful, exact work, 'fastidious', 'meticulous', and 'scrupulous' are the closest matches.
What are antonyms of fastidious?
Antonyms of fastidious include: careless (not paying attention to detail), slovenly (untidy and messy), sloppy (lacking care or neatness), easygoing (relaxed about standards), and indiscriminate (not choosy at all). You might contrast: 'Once fastidious about his appearance, he had become surprisingly slovenly.'
What is the noun form of fastidious?
The noun form is fastidiousness (/fæˈstɪdɪəsnəs/): 'Her fastidiousness about hygiene was well known.' Fastidiousness means the quality of being very attentive to detail and hard to please. The adverb is fastidiously: 'He fastidiously checked every figure twice.' There is no verb form.
What are common collocations with fastidious?
Common collocations with fastidious include: fastidious about, fastidious attention to detail, a fastidious eye, fastidiously clean, fastidiously neat, fastidious in his habits, and almost fastidious. The most frequent pattern is 'fastidious about', as in 'fastidious about cleanliness' or 'fastidious about detail'.
Is fastidious positive, negative, or neutral?
Fastidious can be positive or negative depending on context. As praise, it admires someone for being careful, precise, and high in standards: 'a fastidious craftsman.' As criticism, it suggests someone is fussy, over-particular, and hard to please: 'too fastidious to eat in a roadside cafe.' The tone of the sentence around it usually makes the meaning clear.
What is the difference between fastidious and meticulous?
Both mean very careful about detail, but they differ in feel. Meticulous is almost always positive and focuses on thoroughness and precision in work: 'meticulous research.' Fastidious focuses more on personal standards of neatness, cleanliness, and being hard to please, and can carry a hint of fussiness. A meticulous accountant checks every figure; a fastidious diner sends back an imperfect plate.
How can I practise the word fastidious on LexFizz?
Use LexFizz's Flash Cards to practise fastidious alongside related C1 adjectives like meticulous and scrupulous. The Vocabulary Quiz presents fastidious in sentence context so you learn the pattern 'fastidious about', and the Wordsearch helps you fix the spelling — note the 'tid' in the middle, like 'tidy'. Try writing two sentences: one praising a fastidious craftsman and one gently teasing a fastidious eater.