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
incapableness
inoperancy
apathy
cowardice
depravity
dishonesty
feebleness
helplessness
idleness
inertia
ingratitude
insensibility
laziness
negligence
selfishness
stupidity
timidity
weakness
audacity
capacity
opacity
overcapacity
voracity