proficient adj.
VERBS be, seem | become
ADV. very | fully | fairly, reasonably | technically a technically proficient performance of the piece
PREP. at very proficient at sign language | in She's fairly proficient in Italian.
adj.
adept in handicrafts
an adept juggler
an expert job
a good mechanic
a practiced marksman
a proficient engineer
a lesser-known but no less skillful composer
the effect was achieved by skillful retouching