The story
- Proto-Indo-European · derived from*trewd-“to push, thrust”
- Proto-Indo-European · derived from*pro-“forward; toward”
- Latin · learned borrowing fromprōtrūdere
- English todayprotrude
Learned 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”)).
Words from the same roots
Proto-Indo-European*pro- all →
Proto-Indo-European*trewd- all →
Etymology from Wiktionary, CC BY-SA 4.0.