nonprofessional

US /ˌnɑːn.prəˈfeʃ.ən.əl/
UK /ˌnɑːn.prəˈfeʃ.ən.əl/
1.

ไม่เป็นมืออาชีพ

(of a person) doing something as a hobby or to help someone, not as a paid job:

:
The director liked to use nonprofessional actors in her movies.
1.

ไม่เป็นมืออาชีพ

a person who does something as a hobby or to help someone, rather than as a job that they have been trained for or are paid to do:

:
Her books are popular with both scientists and nonprofessionals.