Today’s pattern is another entry in the “obvious in hindsight” category.
Presupuesto is the common Spanish word for “budget.” Sounds arbitrary and hard to remember.
But it turns out, this is just a participle of presuponer, which is conjugated just like poner and means… to presuppose.
We see the relation between the words obviously in the too-clear pre-s-p-s pattern.
A budget, after all, is just presupposing how all the money will be spent, right?