Grief (noun)

1. Intense sorrow caused by the loss of a loved one.
2. Great sadness or distress caused by a particular event or situation.
3. Mental suffering or unhappiness.
4. The expression of such sorrow or distress.
5. The state of being grieved or saddened.

Origin:

Middle english: from old french grief, from grieff, variant of greif "grievous", from a germanic base meaning "heavy".

Examples:

1. She felt a deep grief after her mother passed away.
2. His grief was overwhelming.
3. The family is in grief over the loss of their loved one.
4. He expressed his grief through art.
5. Her grief was evident in her eyes.