[3:29] 1 sn The verb חָרַשׁ (kharash) means “to cut in; to engrave; to plough; to devise.” The idea of plotting is metaphorical for working, practicing or fabricating (BDB 360 s.v.).
[3:29] 2 tn The vav (ו) prefixed to the pronoun introduces a disjunctive circumstantial clause: “when….”