לוּ (lû) is a Hebrew interjection meaning if. It appears 25 times in 12 books of the Hebrew Bible (Strong's H3863).

Same Hebrew root (TWOT 1085)

Root family 1085: לוּ lû — , לוּא (lûʾ) would that, I wish, perhaps. A Hebrew particle used to mark several kinds of potential constructions

• לוּלֵא lûlēʾ — if not

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