rudiment：雏形，萌芽，基本原理，基础

rude,原始的，-ment,名词后缀。引申诸相关词义。

• revenge
• revengeful
• revenue
• reverberate
• revere
• reverend
• reverie
• revers
• reverse
• reverse engineering
• reversible
• reversion
• revert
• revetment
• review
• reviewer
• revile
• revise
• revision
• revisionism
• revisit
• revitalize
• revival
• revive
• revivify