taru-adjective, adverb taking the 'to' particle
surging water sound
Literary onomatopoeic description of water surging or roaring, often used in classical or poetic contexts.
川の流れが澎湃として岩を打つ。
The river's current surges and strikes the rocks with a roar.
taru-adjective, adverb taking the 'to' particle
Figurative extension describing strong, surging energy, emotions, or movements; literary and somewhat rare.
彼の情熱は澎湃として湧き上がった。
His passion surged up vigorously.
The exact derivation is uncertain; the kanji 澎 and 湃 both relate to the sound or movement of water, and the word is used in literary Chinese and Japanese to describe surging water or vigorous energy.