To express the concept, you would need to use a descriptive phrase, depending on the nuance you wish to convey. Possible options, depending on context, could include:
* κύκλος της ζωής (kýklos tēs zōēs): This translates to "circle of life," which is a close semantic equivalent and likely the most straightforward option.
* A phrase emphasizing reincarnation or cyclical rebirth might incorporate words like:
* μετεμψύχωσις (metempýchōsis): reincarnation
* ἀνάκυκλησις (anákýklēsis): re-cycling, renewal (but not as directly related to life cycles as the others)
The best choice will depend heavily on the specific context and intended meaning. There's no perfect single-word or short phrase equivalent.