efface the mark of circumcision

: mid., in peculiar sense of effacing signs of Judaism (cf. , FlJ, , xii, 5, i; v. Thayer, s.v.), : .† to draw on to become as uncircumcised I Mac 1:15 I Co 7:18 Ant.

to draw over, i.e. (with G203 (ἀκροβυστία) implied) efface the mark of circumcision (by recovering with the foreskin)

become uncircumcised