Senses
空穴来风/ 空穴來風 unfounded
(idiom) used to describe rumors or claims that have no basis in reality; baseless; groundless
空穴来风/ 空穴來風 having a factual basis
(idiom, original meaning) rumors or claims that have a specific reason or basis behind them, just as wind finds a hole to blow through
空穴来风/ 空穴來風 to invite criticism
to provide an opening or pretext for others to criticize or find fault