vi.

1. 喷出；爆发
2. 发疹；长牙

vt.

1. 迸出；喷出

v.

1. (of a volcano) forcefully eject lava, rocks, ash, or gases.
2. break out suddenly:
   fierce fighting erupted.
3. (often erupt in) give vent to feelings in a sudden and noisy way:
   they erupted in fits of laughter.
4. (of a spot, rash, etc.) suddenly appear on the skin.
5. (of a tooth) break through the gums.