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...他在描述鎮上體面人家時滿是貶抑之詞。The knee-length dresses were unflattering and ugly.齊膝長裙既不顯身材又不好看。
英英詞典釋義
Adjective
1. tending to reveal or represent unfavorably;
"an unflattering portrait""the full unflattering light of morning"- Walter de la Mare