also: ぞくぞく
adverb taking the 'to' particle, taru-adjective
Obsolete literary term describing a crowd or things clustering together. Used in classical Japanese with 〜と or 〜たる.
古い文献に「人々が簇々と集まる」とある。
An old document says 'people gather in swarms'.
Alternate reading; included for searchability, but the word is obsolete.
From reduplication of 簇 (sou/zoku), a rare kanji meaning 'crowd' or 'cluster'. The exact historical derivation is uncertain.