φθειρίζομαι
From LSJ
πολλῶν ὁ καιρὸς γίγνεται διδάσκαλος → the critical moment will turn out to be the teacher of many things
English (LSJ)
Pass.,
A pick the lice off oneself, Arist.Fr.76, Thphr.Sign.16, Apollod. ap. Ath.13.586a:—Act. (with fut. -ιῶ) LXXJe.50(43).12.
German (Pape)
[Seite 1270] sich die Läuse absuchen, sich laufen, Her. vit. Hom. 35.