ill-conditioned
Surly and disagreeable
Ill-conditioned describes someone or something with a bad disposition or temperament—surly, disagreeable, or prone to causing trouble: an ill-conditioned horse that bites.
The word is old-fashioned in this sense.
In mathematics and engineering, an ill-conditioned problem or matrix is one where small changes in input produce disproportionately large changes in output, making accurate computation difficult.
Prone to poor health
debilitated · unwell · malnourished · weakened · pallid · wan · sallow · anemic
Ruined through neglect
- decrepitWorn by age
- run-downDeteriorated from neglect
- shabbyWorn and neglected
- derelictAbandoned or neglectful
crumbling · deteriorated · ramshackle · tumbledown · broken-down · decayed · worn · weathered
Not consistently performing
- erraticLacking regularity or consistency
- unpredictableCannot be anticipated
- temperamentalEasily upset, unpredictable
- finickyExcessively particular, hard to satisfy
capricious · inconsistent · glitchy · malfunctioning · faulty · problematic · troublesome · quirky
Difficult to control
- recalcitrantStubbornly resistant to control
- insubordinateDefying rightful authority
- rebelliousResisting authority or control
- defiantOpenly resisting control
wayward · undisciplined · obstinate · intractable · unmanageable · refractory · contumacious · mutinous
One in number
- ill-posedMathematically unstable problem
- degenerateDecline morally or physically
- stiffNot easily bent
- divergentDeviating from the norm
Easily provoked to annoyance
- moodyProne to sullenness
- cantankerousBad-tempered and argumentative
- peevishHabitually fretful
- petulantChildishly bad-tempered
choleric · tetchy · cranky · touchy · hot-headed · quarrelsome · surly · ill-tempered
sickly
Prone to poor health
frail · debilitated · unwell · malnourished · weakened · pallid · wan · sallow · anemic · gaunt
dilapidated
Ruined through neglect
derelict · crumbling · deteriorated · ramshackle · tumbledown · broken-down · decayed · worn · weathered · unkempt
unreliable
Not consistently performing
- erraticLacking regularity or consistency
- unpredictableCannot be anticipated
- temperamentalEasily upset, unpredictable
finicky · capricious · inconsistent · glitchy · malfunctioning · faulty · problematic · troublesome · quirky · balky
unruly
Difficult to control
- recalcitrantStubbornly resistant to control
- insubordinateDefying rightful authority
- rebelliousResisting authority or control
defiant · wayward · undisciplined · obstinate · intractable · unmanageable · refractory · contumacious · mutinous · willful
singular
One in number
- ill-posedMathematically unstable problem
- degenerateDecline morally or physically
- stiffNot easily bent
irritable
Easily provoked to annoyance
- moodyProne to sullenness
- cantankerousBad-tempered and argumentative
- peevishHabitually fretful
petulant · choleric · tetchy · cranky · touchy · hot-headed · quarrelsome · surly · ill-tempered · bad-tempered
- numerical methodsbisection, interpolation, Gaussian elimination, least squares, convergence
ill-conditionedgood-natured
Having a friendly temperament
well-disposed · amiable · agreeable · pleasant · affable
ill-conditionedwell-conditioned
In peak physical state
well-maintained · fit · sound · well-kept · stable
ill-conditionedwell-conditioned
In peak physical state
fit · healthy · in good shape · hale · robust
condition, conditions, conditioned, conditioning, conditional, conditionally, unconditional, unconditionally, recondition