obstruct
v.to block a path or a view so that nothing can get through or be seen. You can also use it when someone tries to stop a process from moving forward.
v.to block or fill a passage or opening with obstacles; to impede the progress or view of something. Often used in legal or medical contexts to describe the prevention of normal movement or function.
“A fallen tree obstructs the main road.”
“The tall new building obstructs the sunlight that used to reach the small community garden.”
“The defense attorney was accused of attempting to obstruct the investigation by withholding key documents that were essential to the prosecution's case.”
The verb is transitive and requires a direct object.
Obstruct is a transitive verb and does not take the preposition 'to' before its object.
“The park service says Trump's arch would obstruct historic sites.”
From Latin past participle stem obstruct- (“blocked up”), from verb obstruere, from ob (“against”) + struere (“pile up, build”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.