Idiosyncrasy

noun (countable; plural: idiosyncrasies)
/ˌɪd.i.əˈsɪŋ.krə.si/
A mode of behaviour, habit, or characteristic peculiar to a particular individual or group; a distinctive or structural peculiarity in the way something is constituted or operates.

✍️ Usage in a UPSC answer

Sound institutional design must not hinge on the idiosyncrasies of a charismatic administrator, for governance founded on personal temperament rather than codified procedure rarely survives the departure of the individual who animated it.

Synonyms

peculiarityquirkeccentricitymannerismfoibletrait

Antonyms

conformitynormalityconventionalityregularity

🌱 Word Family

idiosyncratic (adj), idiosyncratically (adv), idiosyncrasies (n pl)

🔡 Root

Greek idios = one's own; syn = together, with; krasis = mixture, blend; idiosynkrasia = peculiar temperament

📜 Etymology

From Greek idiosynkrasia 'a peculiar temperament', from idios 'one's own' + syn 'together, with' + krasis 'mixture, blend' (originally the blending of the four bodily humours).

🧠 Memory Hook

"IDIO-" (as in idiot/idiom = one's OWN) + "SYNCRASY" (a SYNcing/blend) — your own peculiar blend of quirks. Think: an idiom is a language's own quirk; an idiosyncrasy is a person's own quirk.

🎯 How This Word Works in UPSC Writing

A distinctive peculiarity of an individual or group. It is useful in GS1 for describing local variation that resists generalisation, such as the idiosyncrasies of a regional kinship practice. Keep it neutral and descriptive: it names something distinctive rather than something wrong, which is precisely why it is safer than words like oddity in academic writing.

⚖️ Don’t Confuse It With

An idiosyncrasy is a distinctive personal or local peculiarity. An eccentricity implies deviation from the norm in a way that draws attention. A quirk is smaller and more casual. An anomaly is a departure from an expected pattern and belongs to analysis rather than description of character.

🇮🇳 Hindi Meaning

विशिष्टता (vishishtatā, distinctiveness) or व्यक्तिगत विचित्रता (vyaktigat vichitratā).

Common Questions

What does idiosyncrasy mean?
A distinctive characteristic or peculiarity belonging to a particular person, group or place.
Is an idiosyncrasy the same as an anomaly?
No. An idiosyncrasy is a distinguishing trait; an anomaly is a departure from an expected pattern.
Relevant across:GS1 · History, Geography & Society

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Resources
Ujiyari Ujiyari — Current Affairs