The story
From New Latin; by surface analysis, hypochondr(ium) + -iasis. See also hypochondria, hypochondrium, and Wikipedia at hypochondriasis § Etymology.
Etymology from Wiktionary, CC BY-SA 4.0.
hypochondriasis
Today it means: A mental disorder (in some classifications of such disorders, including ICD-11) characterized by a persistent preoccupation with having or developing a serious illness, despite the absence of significant physical symptoms or evidence of disease. Full definition →