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。

• insert
• insertion
• in-service
• inset
• inshore
• inside
• insider
• insider trading
• insidious
• insight
• insightful
• insignia
• insignificant
• insincere
• insinuate
• insinuation
• insipid
• insist
• insistence
• in situ
• insobriety
• insofar as
• insolate
• insolation
• insole