The word zarandearon is the preterite form of zarandear in the third person plural.
See the full zarandear conjugation
En otro incidente, tres de los seis acusados zarandearon y golpearon a otro recluso esposado como castigo por haberse resistido a ser esposado.
During a separate incident, three of the six defendants shocked and beat another handcuffed inmate as punishment for his earlier refusal to submit to handcuffing.
Supe más tarde que mientras su bebé se estaba muriendo, esta joven había sido retenida durante dos días por adolescentes armados con fusiles Kaláshnikov, y que la zarandearon para obtener dinero, dinero que claramente no tenía.
I later learned that as her baby was dying, this young woman had been held for two days by some teenage boys who were armed with Kalashnikov rifles, and they were trying to shake her down for more money, money she very clearly did not have.
Las olas zarandearon el portaaviones como si fuera una barquita.
The waves shook the aircraft carrier as if it was only a little boat.
Las olas zarandearon un poco el ferry, pero llegaste bien a tu destino, y eso es lo que cuenta.
The ferry was jostled about by the waves a bit, but you arrived at your destination safely, and that's what counts.
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