Esther 1:4, Question 2. “Tiferes” תִּפְאֶרֶת is a rare word. Why is it being used in this verse?

The fifth noun mentioned in this verse is the unique term, tiferes. The Talmud (Megillah 12a) notes that the word is used by the Torah (as in Shemos 28:2) in connection to the clothing of the kohanim, the priests. This is one of the proofs suggested by the Talmud that Achashverosh used the items – and even the clothes – of the Beis HaMikdash (Holy Temple) in celebrating its demise at this feast.