Mapun - subu 2

subu₂

N-, -um-, si-

To fall or stumble head first; for a cow to put its head down to strike s.o. or another cow with its head.

Lay sumubu ari' ku le' batu bay tabatte' na.

My younger brother fell head first because of a rock he tripped over.

Don't go close to that cow lest it strike you with its head.