adipsia
/(ˌ)eɪˈdɪpsɪə/Medicine
noun
Absence of thirst; lack or loss of the desire to drink; reluctance or refusal to drink.
Origin
Late 18th century; earliest use found in George Motherby (d. 1793), physician. From scientific Latin adipsia, specific use of post-classical Latin adipsia from ancient Greek ἄδιψος lacking thirst + classical Latin -ia.