She needs to grieve her husband's death and that process takes time.
I will grieve later. The class will grieve for their slain classmate.
I will grieve when you are gone.
I will grieve during the funeral. The soldiers grieve for their fallen comrade.
No
Reports of the many deaths and the destruction caused by the earthquake grieve us all.
I grieve the loss of my grandfather. My Grieve (an old automobile) broke down.
To lament is to grieve over the loss of something or someone. Or a lament is a mournful poem or song.
Grieve is already a verb. For example "to grieve someone or something" is an action, therefore it is a verb.
Bill Grieve's birth name is William Thomas Turner Grieve.
It has several meanings, is there a particular one you need?
Yes, the word grieve is a verb.
She will grieve because she lost her father.