Strong's Greek Dictionary
εἰ (eige)
from 1487 and 1065; if indeed, seeing that, unless, (with negative) otherwise
from 1487 and 1065; if indeed, seeing that, unless, (with negative) otherwise:--if (so be that, yet). see GREEK for 1487 see GREEK for 1065
James Strong, Strong's Greek Dictionary (1890) — public domain