IPA: /ˌʌndɪˈzɜːrvd/
KK: /ʌndɪˈzɜrvd/
Not earned or justified; something that is unfair or not deserved.
He received an undeserved punishment for something he didn't do.
Undeserved → It is formed from "un-" (meaning not) and "deserve" (from Old French *deservir*, meaning to earn or merit). The word "undeserved" means not earned or not merited.
Think of 'not' ('un-') earning something ('deserve') — that's why undeserved means something that is not earned.