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Webster 1913 Edition

Adj.

[See

Verb.

, and cf.

Suffocating with heat; oppressively hot; sultry.

[R.]

Evelyn.

Adj.

Suffocating with heat; oppressive with heat; sultry. [See Sultry, which is probably a contraction of sweltry.]

sweltry ‎(comparative more sweltry, superlative most sweltry)

Suffocating with heat; oppressively hot; sultry.
(Can we find and add a quotation of Evelyn to this entry?)