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Synonyms

hellish

American  
[hel-ish] / ˈhɛl ɪʃ /

adjective

  1. of, like, or suitable to hell; infernal; vile; horrible.

    It was a hellish war.

  2. miserable; abominable; execrable.

    We had a hellish time getting through traffic.

  3. devilishly bad.

    The child's behavior was hellish most of the day.


hellish British  
/ ˈhɛlɪʃ /

adjective

  1. of or resembling hell

  2. wicked; cruel

  3. informal very difficult or unpleasant

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adverb

  1. informal (intensifier)

    a hellish good idea

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • hellishly adverb
  • hellishness noun

Etymology

Origin of hellish

First recorded in 1520–30; hell + -ish 1

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.

So this time around, after a hellish year for myself, and frankly, the entire country, I decided Vitamin D was a requirement: I needed to go somewhere warm.

From Salon • Feb. 2, 2026

Sections of charred scaffolding fell from the burning apartment blocks in hellish scenes late on Wednesday, as flames inside apartments sometimes belched out through windows into a night sky that glowed orange.

From Barron's • Nov. 27, 2025

Former BBC media editor Amol Rajan described the job as "hellish" when Davie first took over.

From BBC • Nov. 9, 2025

It has trumped hellish geology and cranked out dozens of gushers.

From The Wall Street Journal • Oct. 29, 2025

When the car proceeded at a moderate speed, which was hardly ever, the whistle sounded no worse than an hellish roar.

From "Cheaper by the Dozen" by Frank B. Gilbreth Jr. and Ernestine Gilbreth Carey