English Reference

Word

heinous

US/ˈheɪnəs/

UK/hˈeɪnəs/

Definition

adj. describing an action or crime that is very wicked, shocking, and cruel.

adj. grossly wicked or reprehensible; used to characterize crimes or acts that provoke extreme moral outrage.

Examples

“The judge described the murder as a heinous crime.”

“The international community condemned the heinous acts of violence committed against innocent civilians during the conflict.”

“Historians continue to debate how ordinary citizens could remain complicit while such heinous policies were being enacted by the state.”

Examples

simple

“The judge described the murder as a heinous crime.”

contextual

“The international community condemned the heinous acts of violence committed against innocent civilians during the conflict.”

complex

“Historians continue to debate how ordinary citizens could remain complicit while such heinous policies were being enacted by the state.”

Usage

Commonly collocates with nouns like 'crime', 'act', 'offence', or 'sin'.

Teaching tip

While this word is formal, it is frequently heard in news reports and true-crime documentaries to emphasize that a crime is not just bad, but truly shocking.

Real-World Examples

“A man found guilty of multiple heinous crimes against a Hamilton sex worker was recently tagged as a dangerous offender.”
Toronto Sun · 28 Aug 2026
“Federico Basile, the mayor of Messina, said he was "deeply outraged" by the "heinous criminal act".”
BBC News · 16 Aug 2026

Etymology

From Middle English hainous, from Old French haïneus (compare French haineux) from haïr (“to hate”), hadir (“to hate”) (compare Old French enhadir (“to become filled with hate”)), from Frankish *hattjan (“to hate”) The fluctuation between pronunciations with /eɪ/ and /iː/ is old; the former reflects adoption of an unmonophthongised pronunciation of Old French -ai-, while the latter reflects a monophthongised form.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Synonyms

Antonyms

admirablevirtuouspraiseworthy

This entry

Level
C1 · Advanced
Frequency
Frequent
Updated
Register
Formal

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English Reference