Noun:
aditua, maite, trebea.
Adjective:
kualifikatua, eraginkor, aditua, trebea, erabilgarri, ikasi, informatuta, ezagutzaile, aktibo, lanean, indartsua, indartsu, potentziala, Abiega, gai.
For a man who wants to deal, you ain't very PROFICIENT at it.
I'm PROFICIENT in the rumba, waltz and cha-cha.