noun
idiom; idiomatic expression
Linguistics term for a fixed expression whose meaning cannot be deduced from its parts.
「油を売る」は日本語の慣用語の一つだ。
"Abura o uru" is one of the Japanese idioms.
イディオム is a loanword from English 'idiom', used in both casual and academic contexts.
Compound of 慣用 (customary use) and 語 (word, language).