书空咄咄 shūkōngduōduō profound frustration Origin Definitions Defs Strokes Stroke Words Sentences Sents 书空 書空 shūkōng to trace characters in the air To write or practice calligraphy by using a finger to trace character shapes in the air or on a palm; also called 空仿 kōngfǎng.咄 duō reduplication tut (literary) an exclamation used to express surprise or wonder