Etymology
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erupt (v.)

1650s, of diseases, etc., from Latin eruptus, past participle of erumpere "to break out, burst," from assimilated form of ex "out" (see ex-) + rumpere "to break, rupture" (see rupture (n.)). Of volcanoes, from 1770 (the Latin word was used in reference to Mount Etna). Related: Erupted; erupting.

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Definitions of erupt

erupt (v.)
start abruptly;
Synonyms: break out
erupt (v.)
erupt or intensify suddenly;
Unrest erupted in the country
Synonyms: irrupt / flare up / flare / break open / burst out
erupt (v.)
start to burn or burst into flames;
Synonyms: ignite / catch fire / take fire / combust / conflagrate
erupt (v.)
break out;
The tooth erupted and had to be extracted
Synonyms: come out / break through / push through
erupt (v.)
become active and spew forth lava and rocks;
Vesuvius erupts once in a while
Synonyms: belch / extravasate
erupt (v.)
force out or release suddenly and often violently something pent up;
erupt in anger
Synonyms: break / burst
erupt (v.)
appear on the skin;
A rash erupted on her arms after she had touched the exotic plant
erupt (v.)
become raw or open;
Synonyms: recrudesce / break out
From wordnet.princeton.edu