1 mourn, bemoan, bewail, wail, weep (over), grieve (for or over), keen (over), sorrow (for or over):
A year later, and she is still lamenting the death of her hamster?!
2 lamentation, moaning, mourning; keen, dirge, elegy, knell, Requiem, monody, threnody, thanatopsis, epicedium, Scots and Irish coronach:
Laments for Kitty's late husband were heard throughout the village.