regressionn.
英 rɪ'greʃ(ə)n | 美 rɪ'ɡrɛʃən
中文n. 回归；退化；逆行；复原
词根词源
regression (n.)early 15c., from Latin regressionem (nominative regressio) "a going back, a return," noun of action from past participle stem of regredi (see regress (n.)).
关键词