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enter uninvited;
"They intruded on our dinner party"
"She irrupted into our sitting room"
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erupt or intensify suddenly;
"Unrest erupted in the country"
"Tempers flared at the meeting"
"The crowd irrupted into a burst of patriotism"
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increase rapidly and in an uncontrolled manner;
"The population of India is exploding"
"The island's rodent population irrupted"