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reso

/ˈre.zo/

Italian past participle meaning returned or rendered

From Italian, ultimately from Latin reso (returned).

noun
adjective
verb
reso
Latin
redditus
Past participle of reddere, “to give back, return, or render”; the likely historical source.
Italian
reso
Irregular past participle associated with rendere, “to return, render, or yield.”
Modern English
reso

In Italian, reso is the compact past participle of rendere: something has been returned, rendered, or handed back. Its likely ancestor is Latin reddere, a practical Roman verb meaning “to give back,” built around the idea of sending something in the opposite direction. That same Latin family also left descendants connected with rendering, restitution, and even revenue—the money “given back” or yielded by an investment. In Montreal, however, “the Reso” is a completely different creature: an informal nickname for the city’s vast underground pedestrian network. And online slang has given reso an unrelated, explicit personal meaning, so context matters enormously: in Italian grammar it may describe a returned object, while in Montreal it may lead you beneath the streets.

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