The word "idiosyncrasy" in English means: A strange or unusual habit, way of behaving, or feature that someone or something has., A quality that is particular to someone or something, especially something unusual..
The phonetic transcription of "idiosyncrasy" is /ˌɪdɪəsɪŋˈkræsi/ in British English and /ˌɪdioʊsɪŋˈkræsi/ in American English. Click the 🔊 button to hear both pronunciations.