An archaic or specialized term relating to appetite or the stimulation of appetite.
From French appétisse or Latin appetitus. This is an older or rarer form, possibly from French cuisine terminology, referring to dishes meant to stimulate appetite.
This word is so rare you might encounter it in medieval cookbooks or very old French medical texts—language evolves, and words like appetisse quietly fade away when simpler words (like 'appetite') take over, which is why English has such a graveyard of forgotten vocabulary.
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