Same as compulsative.

adjective. Operating with force; compelling; forcing; constraining; resulting from, or enforced by, compulsion.

adjective. Enforced by or resulting from compulsion; employing force or constraint; compulsory.

"'The step she so freely blames herself for taking, was truly what she calls compulsatory: for though she was provoked to think of going off with me, she intended it not, nor was provided to do so: neither would she ever have had the thought of it, had her relations left her free, upon her offered composition to renounce the man she did not hate, in order to avoid the man she did."

compelling  constraining  forcing