Nonproficiency
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nonproficiency — nonproficient, adj. /non preuh fish euhn see/, n. absence or lack of proficiency. [1585 95; NON + PROFICIENCY] * * * … Universalium
nonproficiency — non pro•fi′cien•cy n … From formal English to slang
nonproficiency — nonproficient, adj. /non preuh fish euhn see/, n. absence or lack of proficiency. [1585 95; NON + PROFICIENCY] … Useful english dictionary