EntryCommon

  1. Adverb taking the 'to' particle, Adverb (fukushi)

    steadily; unflaggingly; untiringly; laboriously; diligently

    Onomatopoeic or mimetic word

    彼はこつこつ事実を調べていた。
    He was patiently digging for facts.

  2. knocking; tapping; clicking; drumming

    Onomatopoeic or mimetic word

Also written こつこつ

Pitch on OJAD