Definitions for lamentingly
Random House Webster's College Dictionary
to express often vocal mourning or grief for or over:
lamented the death of their leader.
to be very sorry for; regret.
(v.i.)to mourn deeply and often vocally.
(n.)an often vocal expression of grief or mourning.
Origin of lament:
1520–30; < L lāmentum plaint; (v.) < L lāmentārī
In an lamenting manner.
in a lamenting manner