fearsome

adjective

fear·​some ˈfir-səm 

1

a

: causing fear

a fearsome monster

b

: intense, extreme

fearsome determination

2

: timid, timorous

fearsomely adverb

fearsomeness noun

Synonyms of fearsome

• formidable
• terrifying
• frightening
• scary
• horrible
• terrible
• intimidating

Examples of fearsome in a Sentence

at night the child would always imagine that there were fearsome monsters lurking under his bed

after working all afternoon in the hot sun, I had developed a fearsome thirst

Recent Examples on the Web

But as the fearsome storm unfolded, perplexing science questions emerged, said Joshua Wadler, an associate scientist at Embry-Riddle Aeronautical University in Daytona Beach who was aboard the flights on Kermit with Hazelton. —Dinah Voyles Pulver, USA Today, 2 Nov. 2025

That discovery in 2006 now appears to have overturned decades of dinosaur dogma about Tyrannosaurus rex, the fearsome giant long thought to be the sole top predator stalking the late Cretaceous. —Ari Daniel, NPR, 30 Oct. 2025

Despite their fearsome reputation, Jamaican crocodiles generally avoid humans and attacks are rare. —Gabe Whisnant, MSNBC Newsweek, 28 Oct. 2025

Lying in wait in London was another with a similarly fearsome pass rush and a quarterback capable of picking its defense apart. —The Athletic Nfl Staff, New York Times, 19 Oct. 2025

Word History

Etymology

fear entry 1 + -some entry 1

First Known Use

1768, in the meaning defined at sense 1a

Kids Definition

fearsome

adjective

fear·​some ˈfi(ə)r-səm 

1

: causing fear

2

: timid

fearsomely adverb

fearsomeness noun