Here's what I've got this week from Tristram Shandy by Laurence Sterne:
Crasis: (archaic) Composition; constitution; blending; makeup
This is all that ever staggered my faith in regard to Yorick's extraction, who by what I can remember of him, and by all accounts I could ever get of him, seemed not to have had a single drop of Danish blood in his whole crasis....
Mercurial: characterized by rapid and unpredictable changeableness of mood
Heteroclite: a person or thing that deviates from the ordinary rule or form
Declensions: everything I can find on this seems to refer to the "inflection of words that serves to indicate number and gender"; I'm not sure how that applies hereGaieté de Cœur: Light-heartedness
--he was on the contrary, as mercurial and sublimated a composition,--as heteroclite a creature in all his declensions,--with as much life and whim and gaieté de cœur about him, as the kindliest climate could have engendered and put together.