Fundamento (en. Basis)
/fun-da-men-to/
Slang Meanings
When an idea has no support.
That theory is a very weak foundation.
Esa teoría es un fundamento muy débil.
In acronyms, FUD to refer to an idea that has no foundation.
Don't listen to that FUD; it has no foundation.
No escuches ese FUD, no tiene fundamento.