irretrievable breakdown of the marriage

| \ ˌir-rə-ˈtrē-və-bəl- \ | ir·re·triev·able break·down of the marriage

1. : a broad ground for divorce that is predicated on the development of incompatibility between marriage partners and that is used in many states as the sole ground of no-fault divorce — called also irremediable breakdown of the marriage, irretrievable breakdown; compare irreconcilable differences