What does cachexy mean?
Cachexy is a formal medical noun denoting a state of profound bodily wasting and weakness that accompanies serious chronic illness, such as advanced cancer, heart failure, tuberculosis, or AIDS. A person suffering from cachexy loses both muscle mass and body fat despite adequate nutrition, because the underlying disease drives an abnormal metabolic state; unlike ordinary starvation, the condition cannot be reversed simply by eating more. The term derives from Greek roots meaning 'bad condition' (kakos, 'bad', plus hexis, 'condition' or 'habit of body'), reflecting how ancient physicians viewed it as a sign of constitutional decline. In modern usage, 'cachexia' has largely displaced 'cachexy' as the preferred form, though both appear in clinical literature, and the adjective 'cachectic' describes affected patients. The word carries a somber, grave connotation, since it typically signals late-stage disease, and it belongs chiefly to medical and historical registers rather than everyday conversation.
nounA state of severe ill health and malnutrition marked by extreme wasting of the body, especially the loss of muscle and fat; it is now usually called cachexia.
- Severe physical wasting and weakness accompanying a chronic illness such as cancer, heart failure, tuberculosis, or AIDS, involving loss of muscle mass and body fat that cannot be fully reversed by nutritional intake.
"The patient's progressive cachexy made even simple treatments difficult to tolerate."
"Despite aggressive nutritional support, the cancer patient continued to slide into cachexy."
"Nineteenth-century physicians described the advanced cachexy of consumption in grim clinical detail."
Rarely pluralized; the word is nearly always used as an uncountable mass noun describing a condition, so a plural form is seldom needed.
"The ward's case notes recorded several distinct cachexies, each tied to a different underlying malignancy."
The same Greek root that gives us 'cacophony' — kakos, meaning 'bad' — also names one of medicine's most feared conditions: cachexy, literally 'bad condition.'
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cachexy
Cachexy comes from the Greek 'kakexia,' formed from 'kakos' ('bad') and 'hexis' ('condition, state of body'), so it literally means 'bad condition.' The term passed into Latin and then into European medical vocabulary, entering English in the mid-sixteenth century. It shares its pejorative root 'kakos' with words such as 'cacophony' and 'cacoepy,' while the suffix '-hexia' connects it to terms describing states of the body. Its close variant 'cachexia,' built on the same Greek model, eventually became the dominant form in modern medicine.
Related word forms
How cachexy is actually used
Cachexy is a formal medical term, now largely superseded by the more common variant 'cachexia.' It carries a grave connotation, being associated with terminal or advanced disease, and appears mainly in clinical writing and historical medical texts rather than everyday speech. The related adjective is 'cachectic,' as in 'a cachectic patient.'
Easily confused with cachexy
Anorexia is loss of appetite or an eating disorder, while cachexy is the resulting bodily wasting seen in serious disease and cannot be reversed by simply eating more.