Grammatical Analysis
Aniccatā: [f.] Impermanence; the state of being impermanent; dissolution. Formed by negative prefix a (not) + nicca (permanent, constant) + tā (suffix, -ness).
Orthodox Definition
Aniccatā is the final characteristic material phenomenon (lakkhaṇa-rūpa) in the Abhidhamma sequence. It refers specifically to the terminal boundary of matter: the absolute dissolution, breaking up, and vanishing of a physical phenomenon.
If Upacaya is the birth of matter, and Jaratā is its aging, Aniccatā is its microscopic death. It is the realization that phenomena do not transition into something else; they cease entirely. The Visuddhimagga clarifies that Aniccatā is not the phenomenon itself, but the characteristic of its destruction. Watching this constant dissolution is the trigger for the higher stages of insight meditation, causing the mind to recoil from the terrifying instability of all formed things.
Textual References
- Abhidhamma: Dhammasaṅgaṇī – Defining impermanence as the destruction and vanishing of the material aggregate.
- Commentary: Visuddhimagga (Chapter XIV & XXI) – Distinguishing between the impermanent thing (anicca-dhamma) and the characteristic of its impermanence (anicca-lakkhaṇa).