indisposition

nouns

a slight illness
indisposition
is derived from
indispose
is a type of (narrower)
impairment of normal physiological function affecting part or all of an organism
illness, malady, sickness, unwellness
a certain degree of unwillingness
"a reluctance to commit himself"; "his hesitancy revealed his basic indisposition"; "after some hesitation he agreed"
disinclination, hesitancy, hesitation, indisposition, reluctance
is derived from
indispose