Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Old French
Origin: haineus, from haine 'hate'

heinous

 adjective
     
hei‧nous formal
1 very shocking and immoral:
2 American English spoken informal extremely bad:
The food in the cafeteria is pretty heinous.
—heinousness noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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