A strander is a person who is stranded, or stuck, in a place with no way to leave.
Being a strander is usually scary or bad, because you can't go where you want to go.
Examples:
The strander was stuck on the island.
The strander couldn't find a way out.
The strander was very sad.
The strander asked for help.
The poor strander was stuck for days.
The strander finally found a way home.