The verb deplore means to say or think that something is very wrong or immoral.
Synonyms are abhor, bemoan, complain, or denounce.
The word origins from 1550s meaning “to give up as hopeless, despair of”, a sense now obsolete and from French (13th century) deplorer, from Latin deplorare meaning “deplore, bewail, lament, give up for lost”. It was derived out of its assimilated form of de- meaning “entirely” plus plorare meaning “weep, cry out”.
I deplore the decisions that were done by our local government.
They deeply deplore the loss of life and violence in a war.
He deplored the fact that the president was driven to resignation.