From the past, present and future

precursor
(n)
prǝ-CURSE-ǝr
Meaning

forerunner; one who goes ahead of the others; one who goes in advance

1st Sample Sentence

Today's thunderstorm is probably a precursor to the monsoon.

Root

prae (before)#currere) (run) (Latin)

Mnemonics

"precursor" = pre (before) + cursor (that points out) == something that points out in advance == forerunner:)