koiria

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

koíriaa

vt. to follow one constantly.

koiria

n. companion, cobber, comrade.

vt. koiria: to accompany, to follow constantly.
koiriana: idem.

ex. e koirianai: he keeps following me.