The Austronesian Comparative Dictionary

*buaŋ to release something pent-up, let something go

PPh buaŋ to release something pent-up, let something go

WMP
Ibaloy i-bowaŋ to release water by removing what blocks it (as plug in rice terrace dyke, opening dam spillway, dismantling dam used in fishing, etc.)
Ilokano i-buáŋ to permit, allow; open (obstruction), open (faucet); set loose (animal); let newly hatched chicks out of the nest
buáŋ opening
Tiruray buaŋ to loosen, to release something