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.
Unrest erupted in the country
The tooth erupted and had to be extracted
Vesuvius erupts once in a while
erupt in anger
A rash erupted on her arms after she had touched the exotic plant
erstwhile
eructate
eructation
erudite
erudition
erupt
eruption
eruptive
-ery
erysipelas
erythema
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