backward directed or facing toward the back or rear; "a backward view"
grammar the branch of linguistics that deals with syntax and morphology (and sometimes also deals with semantics)
reflexive -
without volition or conscious control; "the automatic shrinking of the pupils of the eye in strong light"; "a reflex knee jerk"; "sneezing is reflexive"
involuntary not subject to the control of the will; "involuntary manslaughter"; "involuntary servitude"; "an involuntary shudder"; "It (becoming a hero) was involuntary. They sank my boat"- John F.Kennedy