Not vanquished, beaten or conquered; unbeaten or unconquered(adjective)
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Use "unvanquished" in a sentence
"I am strengthened by a heart pierced but unvanquished."
"But just as the massive bombing of North Vietnam failed to bring the United States an ultimate victory, SEIU's Fresno campaign left its opposition unvanquished, and likely better positioned than SEIU to win future elections."
"The Israelis have always been able to find some Palestinian leader or other to go along with their endless demands, to jump ignominiously through one hoop after another, more like a third-rate court jester than the leader of an unvanquished and defiant people."