adj.
VERBS
▪ be , seem
▪ become
ADVERB
▪ extremely , fairly , very , etc.
▪ highly
▪ fully
▪ reasonably
▪ technically
▪
a technically ~ performance of the piece
PREPOSITION
▪ at
▪
very ~ at sign language
▪ in
▪
She's fairly ~ in Italian.
Proficient is used with these nouns: ↑ reader