I. adjective
Synonyms: backward 1, retral
II. verb
1.
Synonyms: recede 1, back, fall back, retract, retreat, retrocede
Related Word: return, revert; invert, reverse; backslide, lapse, relapse
2.
Synonyms: deteriorate 1, decline, degenerate, descend, disimprove, disintegrate, rot, sink, worsen