renderyoudaoicibaDictYouDict[render 词源字典]
render: [14] Latin reddere meant ‘give back’. It was a compound verb formed from the prefix re- ‘back’ and dāre ‘give’ (source of English date, donate, etc). In Vulgar Latin this was changed to *rendere, perhaps under the influence of prendere ‘take’, which passed into English via Old French rendre. Rent ‘payment’ goes back to the past participle of *rendere.
=> date, donate, rent[render etymology, render origin, 英语词源]
render (v.)youdaoicibaDictYouDict
late 14c., "repeat, say again," from Old French rendre "give back, present, yield" (10c.), from Vulgar Latin *rendere (formed by dissimilation or on analogy of its antonym, prendre "to take"), from Latin reddere "give back, return, restore," from red- "back" (see re-) + comb. form of dare "to give" (see date (n.1)).

Meaning "hand over, deliver" is recorded from late 14c.; "to return" (thanks, a verdict, etc.) is attested from late 15c.; meaning "represent, depict" is first attested 1590s. Irregular retention of -er in a French verb in English is perhaps to avoid confusion with native rend (v.) or by influence of a Middle English legalese noun render "a payment of rent," from French noun use of the infinitive. Related: Rendered; rendering.
render (n.)youdaoicibaDictYouDict
1580s, agent noun from rend (v.).