[ non-pruh-fish-uh n-see ]
/ ˌnɒn prəˈfɪʃ ən si /


absence or lack of proficiency.


Can You Ace This Quiz About “Compliment” vs. “Complement”?
Take this quiz to see if you really know the difference between “compliment” and “complement"!
Question 1 of 11
“Compliment” and “complement” had a shared meaning a long time ago, but today they are no longer interchangeable.

Origin of nonproficiency

First recorded in 1585–95; non- + proficiency

OTHER WORDS FROM nonproficiency

non·pro·fi·cient, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020