DEPLORE, LAMENT, BEWAIL, BEMOAN mean to express grief or sorrow for something.

DEPLORE implies regret for the loss or impairment of something of value.

e.g. deplores the breakdown in family values

LAMENT implies a profound or demonstrative expression of sorrow.

e.g. lamenting the loss of their only child

BEWAIL and BEMOAN imply sorrow, disappointment, or protest finding outlet in words or cries, BEWAIL commonly suggesting loudness, and BEMOAN lugubriousness.

e.g. fans bewailed the defeat

e.g. purists bemoaning the corruption of the language

a passionate expression of grief or sorrow:

«…についての/…という» 嘆き; 後悔; 失望 «for, over/that節» .

e.g. his mother's night-long laments for his father

e.g. a song full of lament and sorrow.

a song, piece of music, or poem expressing sorrow.

«…に対する» 哀悼の歌［言葉］; 挽歌 «for» .

an expression of regret or disappointment; a complaint:

e.g. there were constant laments about the conditions of employment.

verb with object

mourn (a person's loss or death):

…を嘆き悲しむ; …を残念がる; …を後悔する; …に失望する; 〖～(the fact) that節/doing〗 …ということ［…したこと］を嘆く; ｟書｠ 〖直接話法〗…と嘆いて言う

e.g. he was lamenting the death of his infant daughter.

no object (lament for/lament over) express one's deep grief about.

«…のことを» 嘆き悲しむ(grieve) «over, for, about» ; 泣き叫ぶ

reporting verb express regret or disappointment over something considered unsatisfactory, unreasonable, or unfair:

e.g. with object : she lamented the lack of shops in the town

e.g. with direct speech : Thomas Jefferson later lamented, “Heaven remained silent.”.

lamenter noun

late Middle English (as a verb): from French lamenter or Latin lamentari, from lamenta (plural) ‘weeping, wailing’.