JMdict: 1794890

営々 【えいえい】

  1. [adv-to,adj-t] (work) hard; unceasingly; strenuously; assiduously; busily; ardently
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
営 Occupation, Camp, Perform, Build, Conduct (business) エイ いとな.む, いとな.み