Oka, 1. v.t. Prick, stab.
2. n. Any sharp weapon used for stabbing or piercing. Ko tana oka he mea titi ki te whiri o tana komeke.
3. Rafters for the roof of a kumara pit.
4. Branch line of descent.
okaoka, v.t. 1. Split off. Okaokangia he peka mo ta tatou ahi.
2. Split open, as fish for drying.
3. Stab or wound repeatedly.
Williams Dictionary