or גְּבֻל; (shortened) from גָּבַל; properly, a cord (as twisted), i.e. (by implication) a boundary; by extension the territory inclosed; border, bound, coast, [idiom] great, landmark, limit, quarter, space.
or (shortened) אָחֹר ; from אֲחִירַע; the hinder part; hence (adverb) behind, backward; also (as facing north) the West; after(-ward), back (part, -side, -ward), hereafter, (be-) hind(-er part), time to come, without.
a primitive root (identical with through the idea of expansion); to break away (from just authority), i.e. trespass, apostatize, quarrel; offend, rebel, revolt, transgress(-ion, -or).
TRV