rechazasteis
-you rejected
The word rechazasteis is the preterite form of rechazar in the second person plural.
See the full rechazar conjugation

rechazar

No fue a mí a quien rechazasteis.
It wasn't me you spurned.
Decid, ¿por qué rechazasteis a la bella Altisidora? ¿Cuál es el motivo?
You'd better tell us why you didn't reciprocate the beautiful Altisidora's feelings?
Es verdad, me rechazasteis.
Ah, that's right, you rejected me.
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