O.E. swete "pleasing to the senses, mind or feelings," from P.Gmc. *swotijaz (cf. O.S. swoti, Swed. söt, Dan. sød, M.Du. soete, Du. zoet, O.H.G. swuozi, Ger. süß), from PIE base *swad- (Skt. svadus "sweet;" Gk. hedys "sweet, pleasant, agreeable," hedone "pleasure;" L. suavis "sweet," suadere "to advise," prop. "to make something pleasant to"). Sweetbread "pancreas used as food" is from 1565 (the -bread element may be from O.E. bræd "flesh"). To be sweet on someone is first recorded 1694. Sweet-talk (v.) dates from 1936 (in "Gone With the Wind"). Sweet sixteen first recorded 1826. Sweet dreams as a parting to one going to sleep is attested from 1908. Sweet and sour in cooking is from 1723, not originally of oriental food.