un ‧ beat ‧ en /ˌʌnˈbiːtn◂/ BrE AmE adjective
[ Word Family: noun : ↑ beat , ↑ beating ; adjective : beatable ≠ ↑ unbeatable , ↑ beaten ≠ ↑ unbeaten ; verb : ↑ beat ]
a team, player etc that is unbeaten has not been defeated
un ‧ beat ‧ en /ˌʌnˈbiːtn◂/ BrE AmE adjective
[ Word Family: noun : ↑ beat , ↑ beating ; adjective : beatable ≠ ↑ unbeatable , ↑ beaten ≠ ↑ unbeaten ; verb : ↑ beat ]
a team, player etc that is unbeaten has not been defeated
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012