A deficiency.
Hypothermia is the medical term meaning condition of deficient body temperature.
Locked-in syndrome is the condition that results in a patient being aware but unable to move.
Hypothyroidism or hypothyroid.
HYPO gonadism
Haemophilia.
coma
Control
The direct preposition of deficient (lacking) is "in."e.g. He was deficient in mathematical ability. (There was a deficiency.)It might also use "to" or "with" if the deficiency is being modified.e.g. The work was deficient to some degree. (e.g. in some way)e.g. The car is deficient with respect to its braking.NOTE : one cannot be deficient "at" something
hypoxia
An autosomal dominant disorder that results in a defective or deficient LDL receptor is known as familial hypercholesterolemia. (FH). Most patient with FH do not live beyond 30 without intervention.
stupor
To be good at something could be proficient. To be bad at something could, therefore, be deficient. Deficient is an antonym for proficient.