忍俊不住 rěnjùnbùzhù cannot help laughing Definitions Defs Origin Strokes Stroke Words Sentences Sents 忍俊 rěnjùn smiling (bound form) to smile; to beam with joy; often used in the phrase 忍俊不禁 rěnjùnbùjīn meaning unable to restrain a smile不住 bùzhù particle unable to Used after a verb to indicate that an action cannot be performed firmly or securely, or that something cannot be held back or controlled
