unprofessional

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

not characteristic of or befitting a profession or one engaged in a profession
- described in unprofessional language so that high school students could understand it
- was censured for unprofessional conduct
- unprofessional repairs
• Ant:
professional
• Similar to:
amateurish, amateur, inexpert, unskilled