Strong’s Greek
G4274 — prodromos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
πρόδρομος
prodromos — pronounced prod'-rom-os
from the alternate of 4390; a runner ahead, i.e. scout (figuratively, precursor):--forerunner. see GREEK for 4390
1 occurrence in the KJV.
Hebrews 6:20
Whither the forerunner is for us entered, even Jesus, made an high priest for ever after the order of Melchisedec.