(historical, postpositional, usually) Abnormally dark or over-concentrated (associated with various states of discomfort or illness, specifically being too hot or dry).
(broadly) Hot and dry; thirsty or parched.
(archaic) Burnt or having a scorched colour.
Pronounced as (IPA)
/əˈdʌst/
Etymology
From Middle French aduste, and its source, Latin adustus (“burnt, scorched”), past participle of adūrere.