Synonyms:
origin, origination, inception
Meaning: an event that is a beginning; a first part or stage of subsequent events
Usage examples
The very inception of the struggle had provoked bitter words.
In a purely civil matter, the infallible Church from its inception had displayed a marked hostility to loans at interest.
But light is not produced by the transmutation of matter, as though matter were in receipt of a substantial form, and light were a certain inception of substantial form.