adust

adjective3

1. •
   [after a noun] (historical) Abnormally dark or over-concentrated (associated with various states of discomfort or illness, specifically being too hot or dry).

   • From melancholy adust arises one kind [of humour]; from Choler another, which is most brutish: another from Flegme, which is dull; and the last from Blood, which is best. — 1638
2. •
   Hot and dry; thirsty or parched.

   • He was tired and adust with long riding; but he did not go home. — 1862
3. •
   (no longer used) Burnt or having a scorched colour.