sentimental

adjective

1. expressive of or appealing to sentiment, especially the tender emotions and feelings, as love, pity, or nostalgia: a sentimental song.
2. pertaining to or dependent on sentiment: We kept the old photograph for purely sentimental reasons.
3. weakly emotional; mawkishly susceptible or tender: the sentimental Victorians.
4. characterized by or showing sentiment or refined feeling.

adjective

1. tending to indulge the emotions excessively
2. making a direct appeal to the emotions, esp to romantic feelings
3. relating to or characterized by sentiment

adj.1749, “pertaining to or characterized by sentiment,” from sentiment + -al (1). At first without pejorative connotations; meaning “having too much sentiment, apt to be swayed by prejudice” had emerged by 1793 (implied in sentimentalist). Related: Sentimentally.