"The Charnel God" by Clark Ashton Smith

sententiously: in a way that tries to sound important or intelligent, especially by expressing moral judgements

minatory: expressing or conveying a threat

orotund: full, round, and imposing

febrile: having or showing a great deal of nervous excitement or energy

hieratic: of or concerning priests

narcissi: daffodils

sad onyx - both my text and the text below use this term, but it is a strange one. I wonder if perhaps it was meant to be sardonyx?

felicitate: congratulate

adytum: the innermost sanctuary of a temple open only to priests; the Holy of Holies

nacarat: bright orange-red

paean: a song of praise or triumph

nyctalopic: unable to see clearly in low light; night-blind

noctambulist: sleepwalker

The picture used is an illustration by Clark Ashton Smith for the story's publication in Weird Tales

To follow along: http://www.eldritchdark.com/writings/short-stories/22/the-charnel-god