adverb taking the 'to' particle, taru-adjective
unanimously; as one; with one accord
Literary adverb describing people coming together in complete agreement or acting in perfect unison. Often used with と. Rare in modern Japanese; found mainly in classical or formal written contexts.
会衆は翕然として賛成した。
The congregation unanimously agreed.
彼の提案に一同翕然と従った。
Everyone followed his proposal as one.