proficiencies

proficiency

[pruh-fish-uhn-see]
noun
the state of being proficient; skill; expertness: proficiency in music.

Origin:
1535–45; < Latin prōfici(ēns) proficient + -ency

overproficiency, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Etymonline
Word Origin & History

proficiency
1540s, probably from L. proficientem (nom. proficiens), prp. of proficere "accomplish, make progress, be useful," from pro- "forward" + root of facere "to make" (see factitious).
Online Etymology Dictionary, © 2010 Douglas Harper
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