What does «enervar» mean in Spanish?

To irritate, to excite, to make nervous.

Examples of use in Spanish: "me enerva su actitud prepotente".
To weaken, to take away physical or moral energy.

Examples of use in Spanish: "el sofocante calor me enerva".

"la gripe lo enervó".
Relax.

Examples of use in Spanish: "se lo nota tranquilo y enervado disfrutando de la música".
To downplay the importance of someone's reasons or arguments.

Examples of use in Spanish: "en el debate logró enervar todas las argumentaciones de su interlocutor".