Bottleneck (noun)

1. A point of congestion or delay in a system, process, or network that restricts the overall flow or productivity.
2. A limiting factor or constraint that impedes progress or productivity.

Origin:

Derived from the image of a bottle with a narrow neck, limiting the amount of liquid that can flow out at once.

Examples:

1. The bottleneck in the production process was causing significant delays.
2. Traffic was backed up for miles due to a bottleneck on the highway.
3. The company identified several bottlenecks in their supply chain and worked to resolve them.
4. The bottleneck in the network was causing slow internet speeds.
5. She identified the bottleneck in her work and took steps to eliminate it.