sentimental
adjective uk/ˌsen.tɪˈmen.təl/ us/ˌsen.t̬əˈmen.t̬əl/
C2 多愁善感的；感情用事的
A sentimental person is strongly influenced by emotional feelings, especially about happy memories of past events or relationships with other people, rather than by careful thought and judgment based on facts.
Why be sentimental about that old coat? There's no point in keeping it just because you were wearing it when you first met me. 为什么对那件旧外套依依不舍？就因为你第一次遇到我时穿着这件衣服就留着它，这毫无意义。
It's a cheap ring but it has great sentimental value for me. 这只戒指不贵，但对我来说却有很大的纪念价值。
disapproving过于伤感的
too strongly influenced by emotional feelings
silly sentimental songs/stories 愚蠢的伤感歌曲／故事