noun
failure to reach agreement; breakdown in negotiations
Used when discussions or negotiations end without an agreement, often in formal or business contexts.
交渉は物別れに終わった。
The negotiations ended in failure to reach an agreement.
決裂 also means breakdown of talks, but often implies a more dramatic rupture or split, whereas 物別れ focuses on the failure to agree.
Compound of 物 (thing, matter) and 別れ (separation, parting), literally 'separation of matters', referring to a situation where parties cannot come together.