IPA: /bɪˈmoʊn/
KK: /bɪˈmoʊn/
To express sadness or disappointment about something.
She bemoaned the loss of her favorite book.
Past: bemoaned
Past Participle: bemoaned
Bemoan → It is formed from "be-" (meaning about or around) and "moan" (from Old English "mōnan", meaning to lament or express sorrow). The word "bemoan" means to express sorrow or lament about something.
Think of expressing sorrow 'about' ('be-') something that causes you to 'moan' — that's why bemoan means to lament.