If you describe someone or something as unexceptionable, you mean that they are unlikely to be criticized or objected to, but are not new or exciting, and may have some hidden bad qualities.
例句
The candidate was quite unexceptionable, a well-known travel writer and TV personality...候选人是一位知名的游记作家，也是电视名人，基本上无可挑剔。The school's unexceptionable purpose is to involve parents more closely in the education of their children.学校的目的无非是让家长更多地参与孩子的教育。
英英词典释义
Adjective
1. completely acceptable; not open to exception or reproach;
"two unexceptionable witnesses""a judge's ethics should be unexceptionable"