1. 形容詞
   不專業的
   外行的, 不符合專業要求的
   違反職業道德的
   

   同義字詞
   amateur,amateurish,dilettante,dilettantish,inexperienced,inexpert,jackleg,nonprofessional,unskilled,unskillful
   

例句

1. To me, that was unprofessional .
2. That's unprofessional of the club.
3. The clerks were unprofessional and rude.
4. The service of PM is so unprofessional .
5. It makes you look very very unprofessional .
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