Jisho

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Godan verb with 'u' ending, Intransitive verb
1. to accompany; to go hand in hand with; to be consequent uponusu. 〜に伴う
Godan verb with 'u' ending, Transitive verb
2. to be accompanied by; to bring with; to take with; to be involved inusu. 〜を伴う
Other forms
伴なう 【ともなう】
Notes
伴なう: Irregular okurigana usage.

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