prospective (adj.)youdaoicibaDictYouDict[prospective 词源字典]
1580s, from obsolete French prospectif and directly from Medieval Latin prospectivus "affording a prospect; pertaining to a prospect," from Latin prospect-, past participle stem of prospicere (see prospect (n.)). In 17c. also as a noun, "spy glass, telescope." Related: Prospectively.[prospective etymology, prospective origin, 英语词源]