Definition of "Lament" :

noun: a mournful poem; a lament for the dead

noun: a song or hymn of mourning composed or performed as a memorial to a dead person

noun: a cry of sorrow and grief

"Their pitiful laments could be heard throughout the ward."

verb: regret strongly

"We lamented the loss of benefits."

verb: express grief verbally

"We lamented the death of the child."