move upwards in bubbles, as from the effect of heating; also used metaphorically;
"Gases bubbled up from the earth"
"Marx's ideas have bubbled up in many places in Latin America"
- A fountain of oil gushed up through the floor and high over the top of the derrick into the darkness.
- There still are those lachrymose liberals who can't stop welling up every time they see a black face in their vicinity.
- intumesce 膨胀