Incapacity

[Sarah]

Want of legal ability or competency to do, give, transmit, orreceive something; inability; disqualification; as, the inacapacityof minors to make binding contracts, etc.

[Sarah]

1. lack of ability, force, or effectiveness

2)a physical or mental challenge, making learning or performing basic tasks difficult

3)a legal or official disqualification

[Couch Potatoe]

the fact that you are unable to do something because you do not have the ability or you are too weak:

[Jessica]

Physical or mental inability to do something or to manage ones affairs.