taru-adjective, adverb taking the 'to' particle
clear and bright (sound); pellucid
A formal, literary term describing a sound that is clear, ringing, and bright, often used in classical poetry or elevated prose. Modern usage is extremely rare.
鐘の音が喨喨と響き渡った。
The sound of the bell rang out clear and bright.
彼の声は喨喨として、広間の隅々まで届いた。
His voice was pellucid, reaching every corner of the hall.
Describes purity or clarity in a broader sense (water, heart, sound), while 喨喨 is specifically a literary term for clear, bright sound.
Also a literary term for a clear, sonorous voice, but 朗々 emphasizes fullness and resonance, whereas 喨喨 emphasizes brightness and clarity.
The exact derivation is uncertain. The kanji 喨 is rare and used phonetically to represent a clear ringing sound. The reduplicated form follows a pattern common in literary sound-descriptive words.