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nonproficiency

[non-pruh-fish-uh n-see]
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noun
  1. absence or lack of proficiency.
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Origin of nonproficiency

First recorded in 1585–95; non- + proficiency
Related formsnon·pro·fi·cient, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018