Abbott-Smith Manual Greek Lexicon
ἐπι-σπάω (G1986)
1 ἐπι-σπάω , -ῶ [in LXX: Is 5:18 ( מָשַׁךְ ), etc. ;] to draw on : mid., in peculiar sense of effacing signs of Judaism (cf. I Mac 1:15 , FlJ, Ant. , xii, 5, i; v. Thayer, s.v.), to become as uncircumcised : I Co 7:18 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain