untaba

Bingham: Hiram Bingham, A Gilbertese-English Dictionary (1908, 1953). American Board of Commissioners for Foreign Missions.
Sabatier: Ernest Sabatier, M.S.C., Dictionnaire Gilbertin-Français (1954), translated by Sr. M. Oliva as Gilbertese-English Dictionary (1971). South Pacific Commission Publications Bureau.

Bingham

un/taba

vi. collide.

untaba

n. hurt, collision, conflict.

v. to enter into..., to hurt against, to collide with, to oppose, to contradict.

vc. kauntabaea: to make..., to provoke.
kauntaba: idem. to cause..., to oppose one to another.