marua

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

m'árua

n. deep depression, pit, valley.

a. having a depression.

marua

n. disappearance, perdition.

v. to be lost, gone astray, strayed.

vc. kamarua: to lose, to mislay, to kill, to assassinate, to attack a lone person, to ill treat, to wound.