roadblock

noun

1. any condition that makes it difficult to make progress or to achieve an objective

Similar word(s): barrier

Definition categories: thought, obstacle, obstruction

2. a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc.

Similar word(s): barricade

Definition categories: man–made, barrier

verb

1. (colloquial) To prevent, hinder.