je ne sais quoi

American  

[zhuh n^uh se kwa] / ʒə nə sɛ ˈkwa /

noun

French.

1. an indefinable, elusive quality, especially a pleasing one.

   She has a certain je ne sais quoi that charms everybody.

---

je ne sais quoi British  

/ ʒənsekwa /

noun

1. an indefinable quality, esp of personality

---

je ne sais quoi Cultural  

1. That little something; a quality that eludes description: “The Mona Lisa's smile has a certain je ne sais quoi.” From French, meaning “I don't know what.”

---

Usage

What does je ne sais quoi mean? Je ne sais quoi literally means "I don't know what" in French. The phrase was borrowed into English as an expression of a quality that makes something or someone attractive, distinctive, or special in some way, but is hard to put into words.

Etymology

Origin of je ne sais quoi

Literally, “I don't know what”

Example Sentences

Or just a certain je ne sais quoi?

From The Wall Street Journal • Nov. 27, 2025

Being able to spot the je ne sais quoi that many refer to as star quality is a skill, one that Mr. Thurm has capitalized on throughout his 35-year career.

From New York Times • Feb. 2, 2023

Others gravitate to rooms with views, or dishes with a French je ne sais quoi.

From Washington Post • Jan. 24, 2023

A "free hit" is how Mott described the je ne sais quoi that Stokes brings to the team, with his inclusion in England's XI a closed book as far as Foster is concerned.

From BBC • Oct. 2, 2022

Those whose fables and metaphors, whose similes, and soliloquies, whose diction and je ne sais quoi daily slip into your survival soup, by way of their fingers.

From "Krik? Krak!" by Edwidge Danticat