10 letters · 17 points in Scrabble
adjective having or showing knowledge and skill and aptitude
adjective of or relating to technique or proficiency in a practical skill
originFrom 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.
Etymology from Wiktionary, CC BY-SA 3.0