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。

• closure
• clot
• cloth
• clothe
• clothes
• clothing
• cloud
• clout
• clove
• clover
• clown
• cloy
• club
• club foot
• cluck
• clue
• clump
• clumsy
• clunk
• clunker
• cluster
• clutch
• clutter
• coach
• coaching