frightening

adjective

fright·​en·​ing ˈfrī-tᵊn-iŋ 

ˈfrīt-niŋ

: causing fear

frightening news

a very frightening experience

The man with red eyes made the frightening grimace that passed for his smile.

—Madeleine L'Engle

For a man who had tussled with crocs, venomous snakes and other frightening creatures, this was going to be a leisurely swim.

—Jennifer Wulff et al.

Synonyms

• alarming
• dire
• direful
• dread
• dreadful
• fearful
• fearsome
• forbidding
• formidable
• frightful
• ghastly
• hair-raising
• horrendous
• horrible
• horrifying
• intimidating
• redoubtable
• scary
• shocking
• spine-chilling
• terrible
• terrifying

Examples of frightening in a Sentence

a truly frightening movie

Recent Examples on the Web

The key, psychologists say, is the emotional weight of those headlines’ content—especially for people who find what’s happening in the U.S. today to be genuinely frightening. —Meghan Bartels, Scientific American, 21 Feb. 2025

Bates is frightening in her stillness, which makes Annie’s sudden bursts of violence all the more horrifying. —Tim Grierson, Vulture, 21 Feb. 2025

But former Chicago White Sox closer Liam Hendriks has pitched just five innings since 2022 due to Tommy John surgery and, even more frightening, a battle with stage 4 non-Hodgkin's lymphoma. —Tom Rogers, Newsweek, 21 Feb. 2025

Told over six episodes, the gripping limited series starring Angela Bassett, Connie Britton, Jesse Plemons and Robert De Niro meshes fact with fiction to tell this captivating and frightening life-like story about terrorism, truth, control and oversight. —Stacy Lambe, People.com, 20 Feb. 2025

Word History

Etymology

from present participle of frighten

First Known Use

1652, in the meaning defined above

Rhymes for frightening

• brightening
• heightening
• lightening
• tightening
• whitening
• enlightening