tumbuk 1 verb English. Props s.t. up, as a house sagging on one side, a truck to fix a flat tire; leans s.t. essentially lone against s.t.. Example sentence: Subanen. Kig balay kiin, subay tumbuken, adun ndi' metungkiba'. English. That house must have another post added beside one post, so that it won't have a slanted floor (from sinking post). Synonym. tungku'