sorrow

(noun) an emotion of great sadness associated with loss or bereavement. Example: "He tried to express his sorrow at her loss."

(noun) sadness associated with some wrong done or some disappointment. Synonyms: regret, rue, ruefulness. Examples: "He drank to drown his sorrows." "He wrote a note expressing his regret." "To his rue, the error cost him the game."

(noun) something that causes great unhappiness. Synonyms: grief. Example: "Her death was a great grief to john."

(noun) the state of being sad. Synonyms: sadness, sorrowfulness. Example: "She tired of his perpetual sadness."

(verb) feel grief. Synonyms: grieve.