also: てんかぶそう
na-adjective, noun which may take the genitive case particle 'no', noun
peerless; unequaled; unrivaled under heaven
A yojijukugo meaning there is no equal in the whole world; often used in historical or dramatic contexts to describe supreme skill, strength, or excellence.
He was called a peerless master swordsman.
This castle boasts unequaled strength.