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 purists bemoaning the corruption of the language

verb with object

feel or express strong disapproval of (something):

｟かたく｠ 〈人が〉〈事･物〉を(強く)非難する, 遺憾に思う; ; 〖deplore (A ［A's］) doing/that節〗 (Aが)…すること［…ということ］を非難する, 残念に思う

e.g. we deplore this act of violence.

mid 16th century (in the sense ‘weep for, regret deeply’): from French déplorer or Italian deplorare, from Latin deplorare, from de- ‘away, thoroughly’ + plorare ‘bewail’.