Four-character idioms

A 사자성어 is a set phrase of four Sino-Korean syllables, most of them from old Chinese stories and sayings. They are far more common in ordinary Korean than Latin tags are in English: on the news, at work, in a message to a friend. Grammatically each one is a noun and takes 이에요, 으로 or 하다 like any other. The hints give the literal meaning of the four syllables; the gloss gives what the phrase means today.