The adjective impeccable describes something or someone without any flaws. A stand-up comedian needs impeccable timing for her jokes to work.

The adjective impeccable refers to something or someone without marking or error — but it can describe something spotless or clean. The word comes from the Latin impeccabilis, "to be sinless," which is also an outdated sense in English. You can see how "clean" comes from "sinless." Because of the messy nature of picnic food, it is highly unlikely that you would leave with your clothing still as impeccable as when you arrived, especially if you like lots of mustard and ketchup!

Definitions of impeccable

adj without fault or error

“speaks impeccable French”
faultless, immaculate
being complete of its kind and without defect or blemish

adj not capable of sin

morally excellent

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, can put you on the path to systematic vocabulary improvement.