If someone is incoherent, they are talking in a confused and unclear way.
unintelligible
The man was almost incoherent with fear.
他害怕得几乎语无伦次了。
As the evening progressed, he became increasingly incoherent.
随着夜色加深,他越来越语无伦次了。
She dissolved into incoherent sobs.
她禁不住语无伦次地哭诉了起来。
If you say that something such as a policy is incoherent, you are criticizing it because the different parts of it do not fit together properly.
disjointed
an incoherent set of objectives.
一组前后不连贯的目标。
This is a vote against bad pension reform and a contradictory, incoherent pension policy.
该投票反对糟糕的养老金改革以及自相矛盾、缺乏连贯性的养老金政策。