אוּלַי (ʾûlay) is
a Hebrew adverb
meaning if not. It appears
45 times
in 17 books of the Hebrew Bible
(Strong's H194).
Also rendered
perhaps
Same Hebrew root (TWOT 46)
Range of meaning (TWOT 46)peradventure, perhaps; if peradventure; unless; if not; if so be, may be
Full entry: Brown-Driver-Briggs and Strong's
אוּלַיadverb
1.peradventure, perhaps; usually expressing a hope
2.followed by another clause, it expresses virtually the protasis = if peradventure
3.unless
Strong's H194אוּלַי: if not; hence perhaps KJV:if so be, may be, peradventure, unless.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.