sickness

noun

1. (countable, uncountable, usually)The quality or state of being sick or diseased; illness; an illness.

   “I do lament the sickness of the king.”

   “18th century, Alexander Pope, Epistle to Miss Blount Trust not too much your now resistless charms; Those, age or sickness soon or late disarms.”

   “Sickness is a dangerous indulgence at my time of life.”

2. (uncountable, usually)Nausea; qualmishness; as, sickness of stomach.
3. (uncountable, usually)The analogical misuse of a rarer or marked grammatical case in the place of a more common or unmarked case.

   “We can now return to the question of how we treat the phenomenon of dative sickness (the possibility of substituting dative in place of accusative on the experiencer nominal) in Icelandic.”