lumbuk Sense 1 verb English. Goes directly toward s.t. Example sentence: Subanen. Lumbuk mu kitu gayu kia. English. Go straight to that tree there. Sense 2 English. Is single-minded. Example sentence: Subanen. Adin sug lumbuk delendemanen, iini penggulaulaanen; ndi'en suklian. English. Whatever he is single-minded about, that's what he does; he doesn't change it.