Ill-fated and Sad sack

Ill-fated adjective - Having, prone to, or marked by bad luck.

Sad sack and ill-fated are semantically related. In some cases you can use "Sad sack" instead an adjective phrase "Ill-fated".

Sad sack noun - Someone who makes mistakes because of incompetence.

Ill-fated and sad sack are semantically related. Sometimes you can use "Ill-fated" instead an adjective phrase "Sad sack".