Source : Webster's Revised Unabridged Dictionary (1913)

Sentimentalize \Sen`ti*men"tal*ize\, v. t.
   To regard in a sentimental manner; as, to sentimentalize a
   subject.

Sentimentalize \Sen`ti*men"tal*ize\, v. i.
   To think or act in a sentimental manner, or like a
   sentimentalist; to affect exquisite sensibility. --C.
   Kingsley.

Source : WordNet®

sentimentalize
     v 1: look at with sentimentality or turn into an object of
          sentiment; "Don't sentimentalize the past events" [syn:
          {sentimentalise}]
     2: make (someone or something) sentimental or imbue with
        sentimental qualities; "Too much poetry sentimentalizes
        the mind"; "These experiences have sentimentalized her"
        [syn: {sentimentalise}]
     3: act in a sentimental way or indulge in sentimental thoughts
        or expression [syn: {sentimentalise}, {sentimentize}, {sentimentise}]