IRRUPT

PRONUNCIATION: (i-RUHPT) Listen to pronunciation

MEANING: verb intr.:
1. To burst or break in.
2. (Of a population) To increase suddenly in number.

ETYMOLOGY: From Latin irrumpere, from in- (into) + rumpere (to break). Earliest documented use: 1855.
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IRR, UPS - a package with a minor or superficial defect not affecting its declared function, delivered by a brown truck

I.R. SUPT - the superintendent radiates warmth

IRRUST - I oxidize in Edinburgh if you leave me out in the rrain