bah

1. An interjection that we, french people, use to show that we are thinking of what we want to say.
2. An interjection to show that something is obvious

Every single french person uses this word

1.
Person 1 : Donc, est-ce que tu veux que je t'achète ce pantalon ? (So, do you want me to buy these pants for you ?)
Person 2 : Bah... ouais, pourquoi pas ! (Bah... yes, why not !)

2.
Person 1 : Mais enfin, tu vas où ? (Hey there, where are you going ?)
Person 2 : Bah, au centre commercial... (Bah, to the mall...)