(someone who pursues a study or sport as a pastime)
(an athlete who does not play for pay)
(engaged in as a pastime; "an amateur painter"; "gained valuable experience in amateur theatricals"; "recreational golfers"; "reading matter that is both recreational and mentally stimulating"; "unpaid extras in the documentary")
(lacking professional skill or expertise; "a very amateurish job"; "inexpert but conscientious efforts"; "an unskilled painting")