忍俊不禁

Pronunciation: rěn jùn bù jīn Literal meaning: Cannot suppress a smile

Origin & Usage

This amused idiom describes being unable (不禁) to suppress (忍) a smile or laughter (俊), originating from Six Dynasties period literary descriptions. It first appeared in court chronicles describing officials maintaining composure despite amusing situations. The specific character '俊' originally referred to the slight facial movements preceding laughter. During the Tang Dynasty, it gained prominence in poetry describing elegantly restrained emotional responses. Unlike terms for uncontrolled laughter, it specifically describes the moment when attempted composure breaks despite social constraints. Modern usage captures situations where humor overcomes formal restraint, particularly in contexts where decorum would normally prevent visible amusement, suggesting genuine humor often proves irrepressible despite social conventions.

When to Use

Situation: Even the stern professor couldn't help smiling at the clever comment

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