mutual mourning
Refers to a situation where two parties are both in mourning, and according to custom, they refrain from exchanging condolence calls or offering help to each other. This is a specialized term related to Japanese funeral etiquette.
During mutual mourning, it is customary to refrain from making condolence calls to each other.
Variant spelling using 悔やみ instead of 悔み; both are used.
Compound of 相 (あい, mutual) and 悔み (くやみ, mourning). The exact historical origin is uncertain, but it follows a common pattern of forming nouns with 相- to indicate reciprocity.