Extended Strong's Greek Lexicon (Abbott-Smith based)
to lighten
Usage: κουφίζω (κοῦφος, light), [in LXX: Exo.18:22, Jon.1.5, al. (קָלַל hi.), Est.5:1, al. ;] __1. intrans., to be light (poetic chiefly). __2. to lighten, make light: with accusative, Act.27:38.† (AS)