The Collaborative International Dictionary
Sweltry
Sweltry \Swel"try\, a. [See Swelter, Swelt, v. i., and cf.
Sultry.]
Suffocating with heat; oppressively hot; sultry. [R.]
--Evelyn.
Douglas Harper's Etymology Dictionary
sweltry
1570s, for *sweltery, from swelter (v.) + -y (2).
Wiktionary
sweltry
a. Suffocating with heat; oppressively hot; sultry.
WordNet
sweltry
adj. excessively hot and humid or marked by sweating and faintness; "a sweltering room"; "sweltering athletes" [syn: sweltering]