Strong’s Greek
G1509 — ei
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
εἰ
ei — pronounced me ti {i may tee
from 1508 and the neuter of 5100; if not somewhat:--except. see GREEK for 1508 see GREEK for 5100
0 occurrences in the KJV.