If you describe something as unflattering, you mean that it makes a person or thing seem less attractive than they really are.
例句
He depicted the town's respectable families in an unflattering light...他在描述镇上体面人家时满是贬抑之词。The knee-length dresses were unflattering and ugly.齐膝长裙既不显身材又不好看。
英英词典释义
Adjective
1. tending to reveal or represent unfavorably;
"an unflattering portrait""the full unflattering light of morning"- Walter de la Mare