ko-a (transitive verb) (of a person) to refuse; to be difficult, abnegate, resist; to shout at; to be hard; (of disease, injury) to be painful to; to deny. abu eong kalot neejai ejakait, konye kagirok eong noi: I went to the chief but he was hard on me i.e. he shouted at me. (reflexive verb) to fall out with each other; to become enemies. agirokinos aberu k?okilenike: the wife has fallen out with her husband.