词根:grad
grad =step,go,grade步,走,级
gradual [grad步,-ual形容词后缀,…的] 逐步的,逐渐的
retrograde [retro-向后,grad步,行走;’向后走”] 后退,退步,逆行
retrogradation [见上,-ation名词后缀] 后退,退步,逆行
graduate [grad步,级,-u-,-ate动词后缀;’在学业上走完某一步”,’在学业上完成某一级”] 毕业;[转为] 毕业生
graduation [见上,-ation名词后缀] 毕业
undergraduate [under-低于,不够,不到,不足,graduate毕业生] 沿未毕业者,大学肄业生
postgraduate [post-后,在…之后,见上] 大学毕业后的;研究生
degrade [de-下,向下,grad步,走,级;’往下走”,’降级”] 下降,堕落,退化,使降级,贬黜
degradation [见上,-ation名词后缀] 堕落,退化,降级,贬黜
grade 等级,年级,级别,阶段,程度
gradation [见上,-ation名词后缀] 等级,分等,分级
upgrade [up上,grad步,级] 上升,升级,提升,上坡
downgrade [down下,grad步,级] 降低,贬低,降级,下坡
gradine [grad步,级→阶梯,-ine名词后缀] 阶梯的一级,阶梯座位的一排