dulcet (adj.)

"sweet to the senses," especially of taste, also "melodious, harmonious," late 14c., doucet, from Old French doucet, diminutive of doux "sweet," earlier dulz, from Latin dulcis, from Proto-Italic *dulkwi-, from PIE *dlk-wi-, suffixed form of root *dlk-u- "sweet," which probably is also the source of Greek glykys "sweet" (compare gluco-).