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。

• seism-,seismo-
• seize
• seizure
• seldom
• select
• selection
• selective
• selector
• Selene
• selenium
• self
• self-
• self-congratulation
• self-defense
• self-deprecating
• self-indulgent
• selfish
• self-knowledge
• selfless
• self-love
• self-mutilation
• self-opinionated
• selfsame
• self-starter
• selkie