simple past tense and past participle of unmatch
"The old keys were lost years ago, leaving them unmatched to any lock in the house."
eminent beyond or above comparison
"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"
not matched; odd
"He wore bright red shoes that looked completely unmatched against his black suit."