on what the Buddha taught
Avijjā is often translated as ignorance.
I take avijjā to mean not knowing but that is not why this post is made.
In SN12.12 this is said of avijjā: 'dukkhe aññāṇaṃ, dukkhasamudaye aññāṇaṃ, dukkhanirodhe aññāṇaṃ, dukkhanirodhagāminiyā paṭipadāya aññāṇaṃ. ayaṃ vuccati, bhikkhave, avijjā'.
With ignorance for avijjā and not knowing for aññāṇa it is translated to something like this: 'Not knowing suffering, not knowing the arising of suffering, not knowing the cessation of suffering, not knowing the way going to the cessation suffering; this is called ignorance'.
However, rightly or wrongly, ignorance is often seen as linked to ignoring. And this then is used, in answering questions or in a discussion, to point out 'your fault' not seldom seen together with 'your ego'. A show stopper if you don't want to be rude and to continue would just be affirming what was just stated.
That ignorance is differently understood may have little to do with the Pāḷi. So we are free to look for synonyms. But, I prefer to use the same pair in a way that it wouldn't matter how ignorance is seen.
Aññāṇa = a + ñāṇa = lack of knowledge = ignorance. And as for a link with ignoring: Perhaps you have seen people asking whether or not it is about suffering because that is not their experience at all, or that it isn't about suffering but about happiness, or that it is not about suffering but rather about unsatisfactoriness or stress. People don't tend to like talking about sickness, death, suffering and try to avoid or soften it. Not wanting to look into suffering, they thus turn a blind eye to it. And there on that level lies the ignoring. So ignorance then forms a basis for not knowing:
'What is the ignorance of suffering, ignorance of the arising of suffering, ignorance of the cessation of suffering, ignorance of the way going to the cessation of suffering; this is called, almsmen, the not knowing.'
And now answering a question with 'because you don't know' would be a mood point to make. In the context of dependent-co-arising it wasn't about 'your ignorance' or 'you don't know' in the first place but in any case the discussion should now go a little different. To counter the lack of knowledge you should get yourself informed. So don't feel pressured to stop the questioning by the 'because of your ignorance/ego' arguments.
Aññāṇa (nt.) ignorance.
Avijjā (f.) not knowing.