breakdown (of talks, negotiations, etc.); rupture; the failure to reach agreement.
交渉が決裂し、ストが行われた。
Negotiations broke down, and a strike took place.
両国の会談は互いの主張の違いで決裂した。
The talks between the two countries collapsed because of differences in their positions.
その計画は内部分裂でついに決裂に至った。
The plan ultimately fell apart due to internal disagreement.