Erupt or intensify suddenly. Synonyms:break open, burst out, flare, flare up, irrupt."Tempers flared at the meeting" , "The crowd irrupted into a burst of patriotism"
... Geysers erupt at intervals instead of continuously boiling, because their long, narrow, and often tortuous conduits do not permit a free circulation of the water. After an eruption the tube is refilled and the water again gradually becomes heated. Deep in the tube where it is in contact with hot lavas the ... — The Elements of Geology • William Harmon Norton
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