abdicator：弃权人，让位者，辞职者 

词根词缀：ab-分离 + -dic-说 + -ator名词词尾

• undergraduate
• underground
• underhand
• underlie
• underline
• underling
• underlying
• undermine
• underneath
• underpass
• underpin
• underscore
• undersecretary
• undershoot
• understand
• understanding
• understudy
• undertake
• undertaker
• undertaking
• under the rose
• underwear
• underwhelmed
• underwrite
• undesirable