proficiency

n. expertise, state of having expert skills; skillfulness, adeptness; masterfulness

Noun
1. the quality of having great facility and competence
(hypernym) competence, competency
2. skillfulness in the command of fundamentals deriving from practice and familiarity; "practice greatly improves proficiency"
(synonym) technique
(hypernym) skillfulness
(hyponym) brushwork

(n.)
The quality of state of being proficient; advance in the acquisition of any art, science, or knowledge; progression in knowledge; improvement; adeptness; as, to acquire proficiency in music.
  

de2 xin1 ying4 shou3
The hands do what the mind thinks.
With facility. With high proficiency. Serviceable. Handy. As clay in the hands of a potter.

Synonyms and related words:
ability, ableness, address, adeptness, adequacy, adroitness, advancement, airmanship, all-knowingness, anabasis, aptitude, artfulness, artisanship, artistry, bravura, brilliance, caliber, capability, capableness, capacity, cleverness, command, competence, competency, condition, control, coordination, craft, craftsmanship, cross-disciplinary knowledge, cunning, deep knowledge, deftness, dexterity, dexterousness, dextrousness, diplomacy, efficacy, efficiency, encyclopedic knowledge, expertise, expertness, extensive knowledge, facility, faculty, finesse, fitness, fittedness, flair, general knowledge, genius, grace, grip, handiness, headway, horsemanship, ingeniousness, ingenuity, knack, know-how, march, marksmanship, mastership, mastery, maturity, omniscience, ongoing, pansophy, polyhistory, polymathy, practical ability, preparedness, profound knowledge, progress, prowess, qualification, quickness, readiness, resource, resourcefulness, ripeness, savoir faire, savoir-faire, savvy, seamanship, seasoning, skill, skillfulness, special knowledge, style, sufficiency, suitability, suitableness, suitedness, susceptibility, tact, tactfulness, talent, technical brilliance, technical mastery, technical skill, technique, tempering, the goods, the stuff, timing, trim, virtuosity, what it takes, wit, wizardry, workmanship