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Definitions

grievous

[gree-vuhs] / ˈgri vəs /
ADJECTIVE
severe, painful; serious
Synonyms
STRONGEST
appalling atrocious calamitous damaging deplorable dire dreadful egregious flagrant glaring heinous intolerable lamentable monstrous outrageous shameful shocking tragic unbearable
WEAK
afflicting agonizing dismal disquieting distressing disturbing grave harmful heart-rending heavy hurtful injurious mournful offensive onerous oppressive pathetic pitiful sad sharp sorrowful taxing tough troublesome upsetting villainous weighty wounding
Antonyms
STRONGEST
acceptable bearable blessed comforting concealed delightful favorable fortunate good happy hidden little lucky magnificent mild pleasing tolerable wonderful
WEAK
harmless pleasant

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

And it delivers a blunt message, warning that this executive order would inflict a grievous, possibly lethal moral harm on the nation.

From Slate • Feb. 27, 2026

According to the tribunal, this was "a serious and grievous consequence particularly because this has happened through the misconduct of a priest."

From BBC • Feb. 17, 2026

Aside from medical ailments, you may sense that long-ago unresolved issues — ruptured relationships, grievous losses, life-altering decisions — undermine your well-being in subtle but significant ways.

From MarketWatch • Jan. 7, 2026

That gives the impression that the powers-that-be properly acknowledged and put right a grievous wrong.

From The Wall Street Journal • Dec. 16, 2025

"That was a grievous error, Lord Snow," he said at last in the acid tones of an enemy.

From "A Game of Thrones" by George R.R. Martin