alingasaw, masamang amoy na likha ng ulan sa nainitang lupa, alimuom; butlig sa gilid ng bibig

vapor, steam

a leak

May singaw ang tangke.
The tank has a leak.

lakas ng singaw para sa makina
steam power for the machines

to leak steam

Sumingaw ang hangin ng lobo.
The balloon’s wind leaked out.

sumingaw ang baho
the odor leaked out
= a secret revealed

a skin eruption in the mouth area

A singaw is usually a blister on the inner surface of your lips.

It is sometimes translated as “aphthous ulcer” (a canker sore of the mucus membrane in the mouth) but it’s not considered very serious by Filipinos.