Bottleneck

Bot·tle·neck

Bottleneck
  1. a location or situation in which otherwise rapid progress is impeded.
  2. a point at which road traffic slows due to congestion or narrowing of the roadway.
  3. an impasse.
  4. a narrowing.

bottleneck

v. t.
  1. same as obstruct; as, his laziness has bottlenecked our efforts to reform the system.

bottleneck

v. i.
  1. to become narrower as one approaches a point; -- said of roads; as, right by the bridge, the road bottlenecks.