to sharpen
Definition:
to sharpen, whet 1a) (Qal) to whet, sharpen 1b) (Piel) to sharpen, teach (incisively) 1c)(Hithpolel) to be pierced
Definition:
to point (transitive or intransitive); intensively, to pierce; figuratively, to inculcate; prick, sharp(-en), teach diligently, whet.; a primitive root