What is the meaning of ב־?

in

at

with

In (a place or time).

With

  1. By means of, using

    By means of, using

    In a manner characterized by

    While, during.

    While, during.

    Among.

    On (a medium of communication).

    To the power of: Indicating an exponent.

    The forms בָּם and בָּן are archaic except in poetic use.

    Source: wiktionary.org