不知所之 bùzhīsuǒzhī whereabouts unknown Origin Definitions Defs Strokes Stroke Words Sentences Sents 不知 bùzhī verb not to know to not know; to be unaware of or have no idea about所 suǒ particle [relative] Used before a verb to form a noun-like phrase representing the object of the action, meaning "that which" or "what".之 zhī to go (literary) To travel to a place; to head toward.