Un-beaten refers to something that has not been defeated, overcome, or conquered. There are several synonyms for this word, including unbeatable, invincible, undefeated, unvanquished, and unyielding. Unbeatable refers to something that cannot be defeated, while invincible means something that cannot be conquered or overcome. Undefeated means having never been defeated in a contest or competition, while unvanquished refers to someone who has never been conquered or overcome. Lastly, unyielding refers to something that is firm, resolute and relentless, and does not give up or give in despite challenges or obstacles. All these synonyms express the idea of being unbeaten or unconquered in different ways.