φθειρίζομαι

A. pick the lice off oneself, Arist. Fr. 76, Thphr. Sign. 16, Apollod. ap. Ath. 13.586a:—Act. (with fut. ‐ιῶ) LXX Je. 50(43).12.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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