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"
... The last is sometimes worst as well as best, and this belated remnant is not only the last to appear, but the first to disappear. In a considerable percentage of cases it is situated so far back in the jaw that there is no room for it to erupt properly, and it produces inflammatory disturbances and painful pressure upon the nerves of the face ... — Preventable Diseases • Woods Hutchinson
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