奋笔疾书 fènbǐjíshū to write at a tremendous speed Origin Definitions Defs Strokes Stroke Words Sentences Sents 奋笔 奮筆 fènbǐ to write vigorously to wield a pen with energy and speed; to write or paint with great focus疾书 疾書 jíshū to write swiftly to write or scribble rapidly; to write with great speed