And afterwardes he sent her home to his house, where he vsed and interteigned her like his derest and eldest daughter.
Old English deore "precious, valuable, costly, loved, beloved," from Proto-Germanic *deurjaz (cf. Old Saxon diuri, Old Norse dyrr, Old Frisian diore, Middle Dutch dure, Dutch duur, Old High German tiuri, German teuer), ultimate origin unknown. Used interjectorily since 1690s. As a polite introductory word to letters, it is attested from mid-15c. As a noun, from late 14c., perhaps short for dear one, etc.