lament
la-ment
verb
To express deep sorrow or regret about something or someone.
"She lamented the passing of her dear friend."
noun
A passionate expression of grief, sorrow, or regret.
"The mournful lament echoed through the valley."
Thesaurus
Synonyms: threnody, coronach, dirge, requiem, keen, lamentation, wail, plaint, elegy, deplore, bewail, bemoan