To sign the word "accelerable," use both hands to make fists with your thumbs extended, and then quickly bring your fists up and forward in a motion that mimics accelerating.
To sign the word "acceding," make a fist with your dominant hand and place it near your forehead. Then, move your hand forward and down in a small arc motion,…
To sign "acceded," use one hand to form a "C" shape and place it near your forehead. Then, move your hand forward and down in a twisting motion while keeping…