יָכֹל
From LSJ
Ὅρκον δὲ φεῦγε καὶ δικαίως κἀδίκως (κἂν δικαίως ὀμνύῃς) → Iurare fugias, vere, falso, haud interest → Zu schwören meide, gleich ob richtig oder falsch
English (Strong)
or (fuller) yakowl; a primitive root; to be able, literally (can, could) or morally (may, might): be able, any at all (ways), attain, can (away with, (-not)), could, endure, might, overcome, have power, prevail, still, suffer.
