What is the meaning of the word *atammayata*? Is it Pali or Sanskrit? I couldn't find it in any Pali-English dictionary.

Where is it used and in what context? Please provide references from suttas and/or commentaries.

From a Google search, I found various translations like "unconcoctability" or "non-identification" and one person suggested that it's a synonym for "not-self". Is that the case? How is *atammayata* different from not-self?

In [this question](https://buddhism.stackexchange.com/q/25046/471), it was translated as "renunciation equanimity".

Why is *atammayata* important?

I discovered it in [this answer](https://buddhism.stackexchange.com/a/45574/471).