μαστ-ίζω · mast-izō — LSJ
whip, flog, μάστιξεν δʼ ἵππους Il. l.c., etc.; τυ . . ὑπὸ . . ὤμους μαστίσδοιεν (v. supr.) Theoc. l.c.: c. inf., μάστιξεν δʼ ἐλάαν whipped them on or forward, Il. 5.366, Od. 6.82, etc.: metaph., ἵνα . . σε πολλοὶ μαστίξωσι λόγοις Epigr.Gr. 303.5 (Smyrna).
stimulate the bowels, Steph. in Hp. 2.311 D.:— Pass., ib. 312 D.—Ep. word, used twice in Com., Eup. 72, Alex. 133.5, also in LXX Nu. 22.25, Wi. 5.11 (Pass.); and in late Prose, Plu. Alex. 42, Luc. Pr.Im. 24, etc.; the Att. form being μαστιγόω.