retrogressive
adj.
"tending to move backward," 1785, from Latin retrogress-, past participle stem of retrogradi "move backward, go backward" (see retrograde) + -ive. Related: Retrogressively.
〔蒋〕[gress=go，walk行走，-ive形容词后缀，…的] 后退的，退步的，退化的
〔蒋〕[gress=go，walk行走，-ive形容词后缀，…的] 后退的，退步的，退化的