四字熟語とは、一般に、漢字四文字が結びついて、構文上ひとつの単語と同様の働きをするもの

Yojijukugo is a Japanese lexeme consisting of four kanji. English translations of yojijukugo include "four-character compound", "four-character idiom", "four-character idiomatic phrase", and "four-character idiomatic compound".