blanquearías
-you would whiten
The word blanquearías is the conditional form of blanquear in the second person singular. There are other translations for this conjugation.
See the full blanquear conjugation

blanquear

Bueno, solo se me ocurre una razón por la que blanquearías y rellenarías.
Well, I can only think of one reason you'd bleach and regrout.
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