self-generated

[ self-jen-uh-rey-tid, self- ]
/ ˌsɛlfˈdʒɛn əˌreɪ tɪd, ˈsɛlf- /

adjective

made without the aid of an external agent; produced spontaneously.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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