also: めいせいかくかく
taru-adjective, adverb taking the 'to' particle
of great renown; highly illustrious; at the zenith of one's fame
A yojijukugo used in formal or literary contexts to describe someone or something at the peak of fame and glory. Often appears in the ～たる form modifying a noun.
彼は名声赫々たる作家として世界中に知られている。
He is known around the world as a writer of great renown.
名声赫々たる業績を残した科学者だった。
He was a scientist who left behind highly illustrious achievements.