B4 is a special way to write "before".
Find another three (or more) English words that can be represented by B#, i.. the syllable "be" followed by a number.
BENIGN => B9
BEATEN => B10
BEHALF => B1/2
BAIT => B8
*** BONE => B1 could have been a solution. But, I have discarded that possibility as BONE is Not a homophone of B1.
All the other four answers listed above are also homophones of each other.
[EDIT]
BEWON => B1 Bewon is simple past tense and past participle of bewon. Bewon is an archaic word meaning : to gain, win, get possession of . Source:Wictionary
Of course, Bewon Is a Homophone of B1.
Edited on June 1, 2022, 1:00 am