na-adjective, noun which may take the genitive case particle 'no', noun
peerless; unparalleled; matchless
Used to describe something that has no equal, often in formal or literary contexts. Commonly appears as 無比の or 無比な modifying a noun.
彼はその分野で無比の才能を持っている。
He has peerless talent in that field.
この景色は無比な美しさだ。
This scenery is of unparalleled beauty.
From 無 (mu, 'without') + 比 (hi, 'comparison'), literally 'without comparison'. The word is a Sino-Japanese compound (kango) and has been used in formal writing since at least the Meiji period.