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Wiktionary
self-starting

a. 1 (context of a machine English) That starts by itself 2 (context of a person English) energetic and resourceful

Usage examples of "self-starting".

It doesn't have anything to work on and the reaction isn't self-starting again once it's complete.

It doesn’t have anything to work on and the reaction isn’t self-starting again once it’s complete.

It was capable of self-starting, and of going dormant for long periods of time.