(1):

(v. i.) To express or to feel grief or sorrow; to grieve; to be sorrowful; to lament; to be in a state of grief or sadness.

(2):

(v. t.) To utter in a mournful manner or voice.

(3):

(v. i.) To wear the customary garb of a mourner.

(4):

(v. t.) To grieve for; to lament; to deplore; to bemoan; to bewail.