surrender v.

word-forming element meaning "over, above, beyond, in addition," especially in words from Anglo-French and Old French, from Old French sour-, sor-, sur-, from Latin super "above, over," from PIE root *uper "over."

late 14c., rendren, rendre, "repeat, say again, recite; translate," from Old French rendre "give back, present, yield" (10c.) and Medieval Latin rendere, from Vulgar Latin *rendere, a variant of Latin reddere "give back, return, restore," from red- "back" (see re-) + combining form of dare "to give" (from PIE root *do- "to give").

The alteration in Vulgar Latin was perhaps simply nasalization or perhaps on analogy of its antonym, prendre "to take" (itself a contraction of prehendere). The 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," which is in part from French noun use of the infinitive.

The sense of "reduce," in reference to fats, "clarify by boiling or steaming" also is from late 14c. The meaning "hand over, yield up, deliver" is recorded from c. 1400; sense of "to return" (thanks, a verdict, etc.) is attested from late 15c., as is that of "make or cause to be) in a certain state; the meaning "represent, depict" is attested from 1590s. Related: Rendered; renderer; rendering. Also compare rendition, rent (n.1).

*dō-, Proto-Indo-European root meaning "to give."

It forms all or part of: add; anecdote; antidote; betray; condone; dacha; dado; data; date (n.1) "time;" dative; deodand; die (n.); donation; donative; donor; Dorian; Dorothy; dose; dowager; dower; dowry; edition; endow; Eudora; fedora; Isidore; mandate; Pandora; pardon; perdition; Polydorus; render; rent (n.1) "payment for use of property;" sacerdotal; samizdat; surrender; Theodore; Theodosia; tradition; traitor; treason; vend.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit dadati "gives," danam "offering, present;" Old Persian dadatuv "let him give;" Greek didomi, didonai, "to give, offer," dōron "gift;" Latin dare "to give, grant, offer," donum "gift;" Armenian tam "to give;" Old Church Slavonic dati "give," dani "tribute;" Lithuanian duoti "to give," duonis "gift;" Old Irish dan "gift, endowment, talent," Welsh dawn "gift."