undefeated

/ˌʌndɪˈfiːtɪd/
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If an athlete or team is undefeated, nobody has beaten them over a particular period of time. 未被战胜的

adjective [原级] 未被击败的

She was undefeated for 13 years. 她曾十三年未被战胜过。

单词造句:
网友用 “Undefeated” 造句精选
They are undefeated in 13 games. 他们13场比赛未被打败过。