yum-oy [yúm-oy] 1vt To submerge, immerse in water; to dip completely in water. inilubog Kag mga tawo ay ingyum-oy sa tubi tong sinra ay ingbunyagan. The people were submerged when they were baptized at the river. syn: tum-oy, yum-oy 2. 2vi To become submerged in water. inilubog, itinugmaw Nayum-uyan sida it humbak. She was submerged by the wave. syn: yum-oy 1, tum-oy.