melancholy

From Middle English malencolie, from Old French melancolie, from Ancient Greek μελαγχολία (melankholía, “atrabiliousness”), from μέλας (mélas), μελαν- (melan-, “black, dark, murky”) + χολή (kholḗ, “bile”). Compare the Latin ātra bīlis (“black bile”). The adjectival use is a Middle English innovation, perhaps influenced by the suffixes -y, -ly. Doublet of melancholia.