impediment-n; 2 Senses

Sense Number 1: an abstract state of hindrance or restriction

Commentary: IMPEDIMENT[+state][+abstract][+situation][+hindrance]

Examples:
Critics believe the law will result in a serious impediment to scientific and medical progress.
Nuclear liability is a continuing impediment to nuclear commerce and development.
There are age-related impediments that make their marriage null and void.
Her shyness was an impediment to making friends. (a general state or quality)

Mappings:
PropBank: impediment.01
WordNet 3.0 Sense Numbers: 1

Sense Number 2: a physical difficulty

Commentary: IMPEDIMENT[+state][+physical][+difficulty]

Examples:
The speech pathologist helped Bob overcome his speech impediment.
His hearing impediment prevented him from qualifying for the astronaut training program.
Tension in the jaw was an ongoing impediment for the coloratura soprano.

Mappings:
PropBank: impediment.01
WordNet 3.0 Sense Numbers: 2