siesta (n.)youdaoicibaDictYouDict[siesta 词源字典]
"mid-day nap," 1650s, from Spanish siesta, from Latin sexta (hora) "sixth (hour)," the noon of the Roman day (coming six hours after sunrise), from sexta, fem. of sextus "sixth" (see Sextus).[siesta etymology, siesta origin, 英语词源]