interrelationship

US /ˌɪn.t̬ɚ.rɪˈleɪ.ʃən.ʃɪp/
UK /ˌɪn.t̬ɚ.rɪˈleɪ.ʃən.ʃɪp/
1.

相互関係

the way in which two or more things or people are connected and affect one another:

:
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the interrelationship between smoking and respiratory disease