Bereavement (noun)

1. The state of having lost someone or something loved through death.
2. The period of time during which someone grieves for a loved one who has died.

Origin:

Bereavement is derived from the old english word "bearæfnes" which means "the state of being deprived" and the old french word "bereavement" which means "the act of being bereaved".

Examples:

1. She was still in a state of bereavement after the death of her husband.
2. The family was going through a difficult time of bereavement after the loss of their mother.
3. He took a leave of absence from work due to bereavement.
4. The bereavement support group helped her cope with the loss of her child.
5. She felt guilty for feeling happy during the time of bereavement of her best friend.