未み曾ぞ有う

noun which may take the genitive case particle 'no', noun

unprecedented; unheard-of; record-breaking

Describes an event or situation that has never happened before, often with a dramatic or serious tone. Commonly used in news and formal contexts.

• 未み曾ぞ有うの災さい害がいに、国くに中じゅうが衝しょう撃げきを受うけた。

  The whole country was shocked by the unprecedented disaster.

• 未み曾ぞ有うの大おお雨あめで川かわが氾はん濫らんした。

  The river flooded due to record-breaking heavy rain.