Strong's #432: 'illuw (pronounced il-loo')
probably from 408; nay, i.e. (softened) if:--but if, yea though.
Brown-Driver-Briggs Hebrew Lexicon:
ּּ
'illû
1) if, though (contrary to fact)
Part of Speech: conjunction
Relation: probably from H408
Usage:
This word is used 2 times:
Esther 7:4: "to be destroyed, to be slain, and to perish. But if we had been sold for bondmen and bondwomen, I had held my tongue,"
Ecclesiastes 6:6: " Yea, though he live a thousand years twice told, yet hath he seen no"