(ˌʌnɪkˈsɛld) adjincapable of being improved; excelling all othersThesaurus
Adj.
1.
unexcelled - not capable of being improved on unexceeded, unsurpassedbest - (superlative of `good') having the most positive qualities; "the best film of the year"; "the best solution"; "the best time for planting"; "wore his best suit"