This is the 228th most frequent Arabic word.
بي
"بي" means "me" or "in me" depending on context.
'بي' here is used to express the attachment or value towards something, showing an emotional or figurative connection.
الرجل بي صداقته بالجميع.
The man cherishes his friendship with everyone.
'بي' in this instance functions as a preposition meaning 'for,' denoting the exchange or cost of something.
اشترى الكتاب بي درهمين.
He bought the book for two dirhams.
'بي' here is part of the phrase 'بي حاجة,' indicating a state of being in need of something, and thus is used in an idiomatic sense.