sultry (adj.) Look up sultry at Dictionary.com
1590s, "oppressively hot, close and moist" (of weather), from obsolete verb sulter "to swelter" (1580s), alteration of swelter. Figurative sense of "hot with lust" is attested from 1704; of women, "lascivious, sensual, arousing desire" it is recorded from 1940.