‘唐突’ is an adjective describing behavior that is socially inappropriate—rude, abrupt, or impolite—especially when someone imposes themselves without invitation or proper preparation. The character 唐 originally meant ‘empty’ or ‘in vain’ (as in classical usage), and 突 means ‘to rush forth suddenly’ or ‘to burst out’. Together, they evoke the image of an uninvited, jarring intrusion—like barging into a private conversation or making an unsolicited comment. Though it carries an archaic literary flavor, it remains common in formal writing, polite speech, and self-deprecating expressions.

In modern usage, ‘唐突’ often appears in phrases like ‘唐突地…’ (abruptly…), ‘显得很唐突’ (seems very rude), or ‘唐突了您’ (I’ve imposed on you). It conveys not just rudeness but a subtle breach of social grace—less about anger and more about awkwardness, tactlessness, or violating unspoken boundaries of timing and context.