imparadise comes from in- ('into') + paradise, the latter from Old French paradis, from Late Latin paradisus, from Ancient Greek paradeisos ('enclosed park'), of Iranian origin. Morphologically, the prefixed shape matters: the initial element belongs to the recorded formation and helps explain the modern form's surface analysis. In present English, the verb sense is "to make supremely happy as if in paradise", so the historical development ends in a clearly identifiable modern dictionary use. The same base also appears in related forms such as paradise, and in derivatives such as imparadised and imparadising. Its semantic neighborhood includes enrapture, delight, beatify, and enthrall, which helps locate the modern sense without adding a separate etymological claim. The named historical forms include Ancient Greek paradeisos.