mamerto
fool
mammal
animal that gives birth to live young
+
erto
inert, lacking intelligence
A mamerto is a fool, which you can remember by thinking of an mammal0 that is erto1 (inert or lacking intelligence1).
noun
- foolA foolish or naive personNo seas mamerto, eso es obviamente una estafa. // Don't be a fool, that's obviously a scam.