blanqueamiento
whitening
blanco
white
+
-miento
process or action
Blanqueamiento means whitening and can be broken down into blanco0 (white0) + -miento1 (process or action1), so it's the process of making something white.
noun
- whiteningThe process of whitening or bleaching something.El blanqueamiento dental puede mejorar la apariencia de tu sonrisa. // Teeth whitening can improve the appearance of your smile.