비직업적인in English:amateur, nonprofessional, unprofessional

Examples
with 비직업적인.

• 그의 비직업적인 태도는 팀에 문제를 일으켰다.geuui bijigeobjeogin taedo neun tim-e munje-reul ilheukyeotda.His unprofessional attitude caused problems for the team.