Undefeated (adjective)

1. Not having been defeated in a competition, battle, or war.
2. Unconquered, victorious.

Origin:

From the combination of the prefix "un-" meaning "not" and the adjective "defeated" meaning "having been defeated.".

Examples:

1. The team remained undefeated throughout the entire season.
2. The boxer had an undefeated record.
3. The undefated army emerged victorious from the war.
4. She is the undefated champion of the tournament.
5. He remained undefeated in the match.