adj (-er, -est)
- [person] astuto, sagaz, vivo [familiar/colloquial] [move/investment] hábil, inteligente [argument/assessment] hábil, perspicaz, sagaz [remark] perspicaz he's a shrewd observer of the scene es un sagaz or agudo or perspicaz observador de la situación a shrewd decision una decisión muy acertada he's a shrewd businessman es un lince para los negocios to have a shrewd idea estar* casi seguro, tener* una idea bastante aproximada I've got a shrewd idea (of) where she's gone estoy casi seguro de dónde ha ido
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The name of Spain's state-run post office is correos. Stamps can be bought in an estanco, although certified or express mail must be sent from a post office (estafeta or oficina de correos). Postboxes in Spain are silver with red and yellow hoops. There are also red boxes for urgent mail. In Latin America correo, in the singular, means both a post office and the mail system.