agregar
add
aggregate
to collect or gather into a mass or whole
+
-ar
verb suffix
Agregar means to add and can be thought of as aggregate0 + -ar1, where aggregate means to collect or gather into a whole0 and -ar indicates it's a verb1.
verb
  1. add
    To add or include something
    Por favor, agrega sal a la sopa. // Please add salt to the soup.