“+ adjective
Etymology: un- (I) + match, v. + -able
: not matchable:
a. : incomparable , unequaled
state the issue with unmatchable clarity — R.M.Goldman
b. : not capable of being paired or duplicated
furniture … interspersed with modern and unmatchable makeshifts — Bret Harte
• un·match·ably -blē adverb