函调 hándiào to investigate by mail Definitions Defs Origin Strokes Stroke Words Sentences Sents hándiào to investigate by mail 函 hán to mail (bound form) to send by mail; to correspond by letter调 調 diào verbnoun to investigate To investigate; to inquire into; to research.hándiào to transfer by mail 函 hán to mail (bound form) to send by mail; to correspond by letter调 調 diào verb to transfer To transfer, move, or swap personnel, troops, or things; to assign to a new position; to exchange locations.