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adj.
not professional; not engaged in a profession or engaging in as a profession or for gain; "the nonprofessional wives of his male colleagues"; "nonprofessional actors"
adj.
not disciplined or conditioned or made adept by training; "an untrained voice"; "untrained troops"; "young minds untrained in the habit of concentration"
adj.
having or showing or requiring special skill; "only the most skilled gymnasts make an Olympic team"; "a skilled surgeon has many years of training and experience"; "a skilled reconstruction of her damaged elbow"; "a skilled trade"