Ennui. (ahn-WEE)
The medical term for lack of motivation is called "apathy." Apathy is a lack of interest, enthusiasm, or concern about things that typically evoke emotions or excitement. It can be a symptom of various medical conditions, including depression, dementia, and certain neurological disorders.
There is a medical term that implies you are not supposed to eat or drink for about 12 hours before a surgery, and that is 'NPO' or 'Nil Per Os.' That is not a term that implies you should only be on IV nutrition, however.
Objective is the medical term meaning without emotion.
Wernicke's encephalopathy is the medical term meaning degenerative brain disorder caused by lack of thiamine.
Clubbing is the medical term for the changes in fingernails or toenails associated with chronic lack of oxygen.
Hypocapnia is the medical term meaning a deficiency in carbon dioxide levels in the blood. This can occur due to hyperventilation or certain medical conditions affecting lung function.
An asthenia is a medical term for a weakness or a lack of strength.
elimination
If you are referring to lack of or poor muscle tone then "hypotonia" is the correct medical term for low tone, and "atony" for absent tone.
lack of confidence, you will always give up , gaining more wieght
Lack of physical fitness is often called "deconditioning".
Absence of microorganisms is sterile.
atrophy