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。

• undershoot
• understand
• understanding
• understudy
• undertake
• undertaker
• undertaking
• under the rose
• underwear
• underwhelmed
• underwrite
• undesirable
• undiminishable
• undo
• undoubtedly
• undress
• undue
• undulate
• undulation
• undutiful
• unearth
• unearthly
• uneasy
• unedifying
• unemployment