If someone is forlorn, they feel alone and unhappy. One of the demonstrators, a young woman, sat forlorn on the pavement
(Adj ) -desolate or dreary; unhappy or miserable, as in feeling, condition, or appearance
\fur-LORN; for-\, adjective: 1 Sad and lonely because deserted, abandoned, or lost 2 Bereft; forsaken 3 Wretched or pitiful in appearance or condition 4 Almost hopeless; desperate
A forlorn hope or attempt is one that you think has no chance of success. Peasants have left the land in the forlorn hope of finding a better life in cities