adverb
every morning and evening; daily
Literary yojijukugo meaning 'morning and evening, day in and day out'. Used in formal or poetic contexts to express a repeated daily routine.
朝朝暮暮、修行に励む。
He devotes himself to training every morning and evening.
朝朝暮暮、自然の移ろいを感じる。
Morning and evening, I feel the changes of nature.
More colloquial and straightforward way to say 'every morning and every night'. 朝朝暮暮 is a literary, four-character idiom with a classical feel.
A yojijukugo of Chinese origin, combining 朝 (morning) and 暮 (evening) in repetition to emphasize the daily cycle. The exact historical derivation is uncertain, but it follows a common pattern in classical Chinese poetry.