to lament is a form of:

Lament



verb — past tense: lamented ; past participle: lamented ; present participle: lamenting ;
1.
(TRANSITIVE) (feel or express sorrow for) ទួញសោក, សោក
ENGLISH MEANING
noun
1.
An elegy or mournful ballad, or the like.
verb — past tense: lamented ; past participle: lamented ; present participle: lamenting ;
1.
(INTRANSITIVE) To express or feel sorrow; to weep or wail; to mourn.
2.
(TRANSITIVE) To mourn for; to bemoan; to bewail.
3.
Grief or sorrow expressed in complaints or cries; lamentation; a wailing; a moaning; a weeping.