Meaning

verb extend out or project in space

verb bulge outward

verb swell or protrude outwards

originLearned borrowing from Latin prōtrūdere, the present active infinitive of prōtrūdō (“to push or thrust forwards; to protrude”), from prō- (“prefix denoting a forward direction or movement”) (from Proto-Indo-European *pro- (“forward; toward”)) + trūdō (“to push, shove, thrust”) (ultimately from Proto-Indo-European *trewd- (“to push, thrust”)).

Etymology from Wiktionary, CC BY-SA 3.0