单词：unprofessional 

形容词

• 
  [1.a.unprofessional] (同义词:[unprofessional( adj. 外行的, 非职业性的 )]  )
• 
  注释列句：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"
• 近义词 -> [amateurish( adj. 业余的, 非职业的, 不熟练的 )] 
  反义词 -> [professional( n. 自由职业者, 专业人员, 职业运动员, 职业艺人 adj. 专业的, 职业的 )]