a·dept

[adj. uh-dept; n. ad-ept, uh-dept]
adjective
1.
very skilled; proficient; expert: an adept juggler.
noun, ad·ept.
2.
a skilled or proficient person; expert.

Origin:
1655–65; < Medieval Latin adeptus one who has attained (the secret of transmuting metals), noun use of L past participle of adipiscī to attain to (ad- ad- + -ep-, combining form of ap- in aptus apt + -tus past participle suffix)

a·dept·ly, adverb
a·dept·ness, noun
non·a·dept, adjective
non·a·dept·ly, adverb
non·a·dept·ness, noun
un·a·dept, adjective
un·a·dept·ly, adverb
un·a·dept·ness, noun

adapt, adept, adopt.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To adeptness
00:10
Adeptness is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Collins
World English Dictionary
adept
 
adj
1.  very proficient in something requiring skill or manual dexterity
2.  skilful; expert
 
n
3.  a person who is skilled or proficient in something
 
[C17: from Medieval Latin adeptus, from Latin adipiscī to attain, from ad- to + apiscī to attain]
 
a'deptly
 
adv
 
a'deptness
 
n

adept
 
adj
1.  very proficient in something requiring skill or manual dexterity
2.  skilful; expert
 
n
3.  a person who is skilled or proficient in something
 
[C17: from Medieval Latin adeptus, from Latin adipiscī to attain, from ad- to + apiscī to attain]
 
a'deptly
 
adv
 
a'deptness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

adept
1660s (n.), 1690s (adj.), from L. adeptus "having reached, attained," pp. of adipisci "to attain to, acquire," from ad- "to" + apisci "grasp, attain," related to aptus "fitted" (see apt). Noun meaning "one who is skilled in the secrets of anything" is from a M.L. use in alchemy.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Example sentences
The writing program emphasizes the learning of essential skills: the writing
  process, editing adeptness, and research competence.
What is particularly worrisome about the microbe is its adeptness at developing
  drug resistance.
The value he's added for his employers is his adeptness at gaming the system.
Knowledge of finding sources and adeptness in addressing funding issues are
  also necessary.
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