WordReference Random House Learner's Dictionary of American English © 2026
im•per•il /ɪmˈpɛrəl/USA pronunciation
v. [~ + object], -iled, -il•ing or (esp. Brit.) -illed, -il•ling.
WordReference Random House Unabridged Dictionary of American English © 2026- to put in peril or danger;
endanger.
im•per•il
(im per′əl),USA pronunciation v.t., -iled, -il•ing or (esp. Brit.) -illed, -il•ling.
im•per′il•ment, n.
- to put in peril or danger;
endanger.
- im-1 + peril 1590–1600
- risk, jeopardize, hazard, chance.