occlude

山脉会阻挡气流，导致云层形成和降雨。

The mountain range will ___occlude the air flow, resulting in cloud formation and rain.

外科医生小心翼翼地清除了开始堵塞病人动脉的斑块。

The surgeon carefully removed the plaque that was starting to ___occlude the patient's artery.

一根掉落的树枝开始堵塞狭窄的小溪，导致上游积水。

A fallen branch began to ___occlude the narrow creek, causing the water to pool upstream.