anitya

According to Buddhism, living beings go through many births. Buddhism does not teach the existence of a permanent, immutable soul. The birth of one form from another is part of a process of continuous change. Impermanence, called Anicca in Pāli and anitya in Sanskrit, appears extensively in the Pali Canon as one of the essential doctrines of Buddhism. The doctrine asserts that all of conditioned existence, without exception, is "transient, evanescent, inconstant".

Anicca is one of the three marks of existence—the other two are Duḥkha (suffering or dissatisfaction) and Anattā (the lack of a lasting essence).