The Hebrew preposition "ב" (pronounced "be") means "in" or "at." It is commonly used to indicate location, such as being inside a place or at a specific point in time. For example, one might say "בבית" (in the house) or "בשעה שתיים" (at two o'clock). In addition to physical locations, "ב" can also denote involvement or participation in activities. For instance, "במשחק" means "in the game." This versatility makes "ב" an essential part of everyday Hebrew communication, helping to clarify where or when something occurs.