This is the 829th most frequent Arabic word.
بأي
"بأي" means "with which" or "in which" in English.
Here, "بأيّ" is used as an interrogative phrase to ask about a preference among different options.
بأيّ طريقة تفضّل أن نسافر؟
In which way do you prefer we travel?
In this sentence, "بأيّ" is used to indicate inclusivity, meaning support or help is available in any matter.
سأساعدك بأيّ قضية تحتاج فيها للمساعدة.
I will help you with any issue you need help with.
Here, "بأيّ" is asking about a specific parameter, in this case, the speed of the car, among all possible values.