proficient
pro·fi·cient
adjective
Origin
From Latin proficiens, present participle of proficere (“to go forward, advance, make progress, succeed, be profitable or useful”), from pro (“forth, forward”) + facere (“to make, do”); see fact.
Related words
Word family
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.