כּו kav kav (Chaldee); from a root corresponding to H3854 in the sense of piercing; a window (as a perforation)KJV Usage: window.
Brown-Driver-Briggs' Hebrew DefinitionsBDB9608 כּו 1. window Origin: from a root corresponding to H3854 in the sense of piercing TWOT: TWOT - ? Parts of Speech: Noun Feminine
להג lahag lah'-hag From an unused root meaning to be eager; intense mental applicationKJV Usage: study.
להד lahad lah'-had From an unused root meaning to glow (compare H3851) or else to be earnest (compare H3854); Lahad, an IsraeliteKJV Usage: Lahad.