1. [adv]  at or to or toward or the back or rear; "he moved back"; "tripped when he stepped backward"; "she looked rearward out the window of the car"
2. [adv]  in a manner or order or direction the reverse of normal; "it's easy to get the `i' and the `e' backward in words like `seize' and `siege'"; "the child put her jersey on backward"

BACKWARDS is a 9 letter word that starts with B.