irrupt

(verb) enter uninvited. Synonyms: intrude. Examples: "They intruded on our dinner party." "She irrupted into our sitting room."

(verb) erupt or intensify suddenly. Synonyms: erupt, flare up, flare, break open, burst out. Examples: "Unrest erupted in the country." "Tempers flared at the meeting." "The crowd irrupted into a burst of patriotism."

(verb) increase rapidly and in an uncontrolled manner. Synonyms: explode. Examples: "The population of india is exploding." "The island's rodent population irrupted."