"Precursory" is a word in ENGLISH

precursory ENGLISH
Definition:

Preceding as a precursor or harbinger; indicating
something to follow; as, precursory symptoms of a fever.

precursory ENGLISH
Definition:

An introduction.

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Doing easily what others find is difficult is talent doing what is impossible for talent is genius.

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pre- ENGLISH

A prefix denoting priority (of time, place, or rank); as, precede, to go before; precursor, a forerunner; prefix, to fix …

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precursor ENGLISH

One who, or that which, precedes an event, and indicates its approach; a forerunner; a harbinger.

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