Skillful :: Skillful (a.) Possessed of, or displaying, skill; knowing and ready; expert; well-versed; able in management; as, a skillful mechanic; -- often followed by at, in, or of; as, skillful at the organ; skillful in drawing..
Unskillful :: Unskillful (a.) Not skillful; inexperienced; awkward; bungling; as, an unskillful surgeon or mechanic; an unskillful logician..