1. 无与伦比的；无可匹敌的
If you describe something as unmatched, you are emphasizing that it is better or greater than all other things of the same kind.
1. eminent beyond or above comparison
e.g. matchless beauty
the team's nonpareil center fielder
she's one girl in a million
the one and only Muhammad Ali
a peerless scholar
infamy unmatched in the Western world
wrote with unmatchable clarity
unrivaled mastery of her art
Synonym: matchlessnonpareilone(a)one and only(a)peerlessunmatchableunrivaledunrivalled
2. of the remaining member of a pair, of socks e.g.