Abbott-Smith Manual Greek Lexicon
περι-εργάζομαι (G4020)
1 ** περι-εργάζομαι , [in LXX: Wi 8:5 א 1 , Si 3:23 *;] to waste one's labour about a thing. to be a busybody : II Th 3:11 (cf. Plat., Apol. , 19 B).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain