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.).
2 tn The vav (ו) prefixed to the pronoun introduces a disjunctive circumstantial clause: “when….”
3 sn The term רִיב (riv) can mean “quarrel” or “legal accusation” (BDB 936 s.v.). Both ideas would work but the more technical legal accusation fits the context better. This is a warning to not bring legal accusations against anyone without a legitimate reason.
4 tn Heb “a man.”