plaint \PLAYNT\ (noun) - 1 : An expression of sorrow; lamentation. 2 : A complaint.
"It then dawned on Sam this could be the plaint the walkers had been to so long ago. He asked if Reeds and Barns could scan the plaint and see if it could hold life." -- C.B. Hollis, 'Cyber Wolf: Deception'
Plaint comes from Old French plainte, from Latin planctus, past participle of plangere, "to strike the breast, to lament."