butarotaro

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

butæ/rotæro

a. having a sour odor, as a karewe coconut-shell bottle.

n. the sour odor from a coconut-shell bottle in which karewe is kept.

butarotaro

na. the smell of water off a grindstone, smell of dirty water, dirty ibu.