Nibbidā (f.) [ ... ] weariness, disgust with worldly life, tedium, aversion, indifference, disenchantment N. is of the preliminary & conditional states for the attainment of Nibbāna (see nibbāna II B 1) & occurs frequently together with ;virāga, vimutti & nibbāna; ..."
If we see this possible translation of nibbida, there are a lot of contradicting words here.
Aversion and disgust with Worldly life is basically just same.
Disgust is actually the root of aversion. It is even worse than aversion.
Because of ignorant, not able to see something as what they really are, for some object you feel disgust, and for some object you feel attraction. The one that you feel disgust, you avert it. And the one you attract to, you attach.
The right word in my opinion should be indifferent.
Indifferent is unbiased. It is unbiased to good nor bad - and that is the nature of this reality.
The eye see the shit.
Consciousness rised through the eye (which we can call eye consciousness) does not have the ability to differentiate that shit as good or bad.
It is at the second level - which is mind consciousness that is the culprit to differentiate that shit as good or bad.
The way we differentiate that shit as good or bad is the reflection of our ignorance.
One of Buddhist master said this:
...in seeing all the dharmas, the mind is not defiled or attached.....
[The mind’s] functioning pervades all locations, yet it is not attached to all the locations
If we see something and at that instant, we have the sense of disgust, your mind has been defiled.
Your mind has been defiled by something not there, because in reality what you see is actually indifferent.
How can we free from aversion and attachment?
It is actually not through this sense of disgust.
But actually through the sense of indifferent.
When we have this ability to see everything as indifferent, the monkey stop from jumping here and there. It stops from jumping between attachment and aversion.
Because of that, the mind achieve its natural stability.
When this natural stability is achieved through the ability to see every diversity of form, sound, etc. as indifferent, your peace of mind born naturally due to the stopping of monkey mind born from this wisdom.
When anger arise, the arising of anger is not the sign of failure.
But if that anger, successfully defile you so you feel disgust to it and vow to subdue anger, you get defile. All efforts are then effort based on conceptual.
But when that anger arise and we can see the indifferent of that anger as not bad nor good, that anger has no power to bother you as something need to be reacted or something need to e abandoned.
Through that indifferent wisdom, the anger pass by like the dark cloud pass by the indifferent (unbiased) sky.
Untouch through the power of indifferent.
Liberation is natural without any efforts.