σπινθηρίζω
From LSJ
Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη → The first and best victory is to conquer self.
English (LSJ)
A emit sparks, Thphr.HP3.8.7. II cause the emission of sparks, Id.Sign.19, Plu.2.893d.
German (Pape)
[Seite 922] Funken von sich geben, sprühen; Pherecrat. bei B. A. 361; Plut. plac. phil. 3, 2.