UNPARALLELED
unique, alone(p), unequaled, unequalled, unparalleled
(adjective) radically distinctive and without equal; “he is alone in the field of microbiology”; “this theory is altogether alone in its penetration of the problem”; “Bach was unique in his handling of counterpoint”; “craftsmen whose skill is unequaled”; “unparalleled athletic ability”; “a breakdown of law unparalleled in our history”
Source: WordNet® 3.1
Etymology
Adjective
unparalleled (comparative more unparalleled, superlative most unparalleled)
Having no parallel; without equal; lacking anything similar or worthy of comparison.
Source: Wiktionary
Un*par"al*leled, a.
Definition: Having no parallel, or equal; unequaled; unmatched.
The unparalleled perseverance of the armies of the United States,
under every suffering and discouragement, was little short of a
miracle. Washington.
Source: Webster’s Unabridged Dictionary 1913 Edition