Adjective:

தோல்வியற்ற,

undefeated's Usage Examples:

He was an undefeated champion of underground wrestling until he encountered the trio of heroes from Final Fight.

Mario 64, in this humble reviewers opinion, still remains the undefeated champion of 3D platformers.

He died in 1002 undefeated, hut racked by anxiety for the permanence of the prosperity of his house.

If a player won five in a row, then he or she was considered undefeated and would be entered in the Tournament of Champions.

Synonyms:

unbowed, victorious, unvanquished, unbeaten, triumphant, unconquered, successful,

Antonyms:

unfortunate, unproductive, failure, defeated, unsuccessful,