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。

• attraction
• attractive
• attributable
• attribute
• attrition
• attune
• attuned
• atypical
• aubergine
• auburn
• auction
• auction
• auctioneer
• audacious
• audible
• audience
• audio
• audiology
• audiometer
• audiometry
• audiphone
• audit
• audition
• auditor
• antiquark