Forlorn is an old English word

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forlorn
fəˈlɔːn/
adjective
adjective: forlorn
  1. 1.
    pitifully sad and abandoned or lonely.
    “forlorn figures at bus stops”
    antonyms: happy
  2. 2.
    (of an aim or endeavour) unlikely to succeed or be fulfilled.
    “a forlorn attempt to escape”
    synonyms: hopeless, with no chance of success, beyond hope; More

Origin
Old English forloren ‘depraved, morally abandoned’, past participle of forlēosan ‘lose’, of Germanic origin; related to Dutch verliezen and German verlieren, and ultimately tofor- and lose. Sense 1 dates from the 16th century.