为何 (wèi hé) is a formal, literary way to ask 'why' in Chinese. It literally combines 为 (wèi), meaning 'for' or 'because of', and 何 (hé), an archaic interrogative pronoun meaning 'what' or 'which'. Together, they form a classical construction equivalent to 'for what [reason]?' — the closest English parallel being the old-fashioned 'wherefore' (as in Shakespeare’s 'Wherefore art thou Romeo?').

This term appears frequently in written Chinese — such as essays, news reports, academic writing, and formal speeches — but is rare in casual spoken conversation. Native speakers typically use 为什么 (wèi shén me) in everyday speech instead. 为何 carries a tone of gravity, reflection, or rhetorical emphasis, often implying deeper inquiry into motivation, cause, or principle rather than simple factual explanation.