noun
lamentation
lam-uhn-TAY-shun/ˌlæmənˈteɪʃn/
An expression of grief or mourning.
The man's tearful lamentation continues beside the portrait while his companion comforts him.

Etymology
The action ending turns wailing or mourning into the act of expressing grief. A lamentation is therefore sorrow given expression, not merely sorrow felt inwardly.
In context
two wept bitterly— Priam, as he lay at Achilles feet, weeping for Hector, and Achilles now for his father and now for Patroclus, till the house was filled with their lamentation.
More examples
- The poem is a lamentation for lives lost in war.
- We hear her lamentations from the room next door.
- He sits beside his father's grave in quiet lamentation.
Forms
lamentation · lamentations
lament verb — To express grief or deep sorrow.