1. (n.) Lack of capacity; lack of physical or intellectual power; inability\.

2. (n.) Want of legal ability or competency to do, give, transmit, or receive something; inability; disqualification; as, the inacapacity of minors to make binding contracts, etc.

Urdummheit brainlessness caducity decrepitude disability disablement disqualification foolishness ignorance imbecility inability inadeptness inadequacy inaptitude inaptness inattentiveness incapability incapacitation incompetence incompetency indexterity ineffectiveness ineffectuality inefficacy inefficiency ineptitude ineptness infancy inferiority infirmity insipidity instability insufficiency invalidism irrationality lackbrainedness lackwittedness legal incapacity low IQ maladjustment maladroitness mediocrity mental weakness mindlessness minority pedestrianism primal stupidity reasonlessness ricketiness rustiness senility senselessness shakiness skill-lessness slackmindedness slackwittedness thoughtlessness unaptness uncleverness undeftness undexterousness undextrousness unfirmness unfitness unfittedness unintellectuality unintelligence unproficiency unschooledness unskillfulness unsoundness unsteadiness unsturdiness unsubstantiality untrainedness unwisdom unwiseness vapidity wardship wateriness wishy-washiness witlessness