IPA: /ˈdʒɛtsəm/
KK: /ˈdʒɛtsəm/
Items or cargo that are thrown overboard from a ship to reduce its weight, especially in emergencies, or that are found washed up on the shore.
After the storm, the beach was littered with jetsam from the shipwreck.
Jetsam is derived from the phrase 'jet-sam', where 'jet' comes from the Old French 'jeter' (meaning to throw) and 'sam' is a variant of 'same' (meaning the same). The term refers to goods that are thrown overboard from a ship to lighten the load, thus it describes items that are cast away at sea.
Think of 'throwing' ('jeter') things overboard to lighten a ship's load — that's why jetsam refers to items thrown away at sea.
No commonly confused words.