Synonyms of 'precursor'
Real tennis, a precursor of the modern game, originated in the eleventh century.
The deal should not be seen as a precursor to a merger.
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Your forebears are your ancestors.
I'll come back to the land of my forebears.
the forerunners of those who were to support the Nazis
Thesaurus for precursor from the Collins English Thesaurus
A precursor of something is a similar thing that happened or existed before it, often something which led to the existence or development of that thing.