KINAKABAHAN

root word: kaba

kaba
palpitation

kaba
premonition

kinakabahan
is nervous

Kinakabahan ako.
I’m nervous.

Bakit ka kinakabahan?
Why are you nervous?

Ninenerbyos ako.
I’m feeling nervous.

ninenerbiyos
being nervous

Kaba is like having a faint premonition that something bad might happen. Nerbyos is just the usual nerves.