containing expressions that are natural to a native speaker of a language 表达方式地道的；符合（某一）语言习惯的 containing an idiom 包含习语的 an idiomatic expression 惯用语
Word Originearly 18th cent.: from Greek idiōmatikos ‘peculiar, characteristic’, from idiōma ‘private property, peculiar phraseology’, from idiousthai ‘make one's own’, from idios ‘own, private’.