noun, na-adjective, noun which may take the genitive case particle 'no'
unrivaled strength; matchless power
Emphatic compound meaning 'so strong that nothing compares'. Often used in formal or dramatic descriptions of power, ability, or effectiveness.
He defeated his enemies with matchless power.
This vacuum cleaner boasts unrivaled suction power.
Compound of 強力 (kyōryoku, 'powerful') and 無比 (muhi, 'unparalleled'). The exact historical derivation is uncertain, but the combination creates an emphatic four-character compound.