Amateur (abbreviation of 'amateur'); a person who engages in an activity for pleasure rather than as a profession.
彼はアマの写真家で、週末によく撮影に出かける。
He is an amateur photographer who often goes out shooting on weekends.
アマ大会で優勝してプロを目指す選手もいる。
Some players who win amateur tournaments aim to turn professional.