castaway
adjective
°Cast adrift or ashore; marooned.
"After the mutiny, the castaway ship's officers suffered a month at sea in the lifeboat."
°Shipwrecked.
"The storm left them castaway on an uninhabited island."
noun
°(nautical) A shipwrecked sailor.
"Robinson Crusoe was a famous fictional castaway."
°A discarded person or thing.
"This old coat was a castaway in someone's trash."