单词：vacillate 

动词

• 
  [1.v.vacillate] (同义词:[hover( v. 盘旋 )]  [vibrate( v. (使)振动, (使)摇摆 )]  [vacillate( v. 犹豫不定 )]  [oscillate( v. 振荡 )]  )
• 
  注释列句：be undecided about something; waver between conflicting positions or courses of action; "He oscillates between accepting the new position and retirement"
• 上位词 -> [hesitate( v. 犹豫, 踌躇, 不愿 )] 
• 下位词 -> [shillyshally] 
  派生词 -> [vacillant( 游移的, 摇摆不定的  犹豫不决的 )]  [vacillation( n. 摇摆游移不定, 踌躇, 不果断 )]  [vacillator] 
  
• 
  [2.v.vacillate] (同义词:[fluctuate( vi. 变动, 波动, 涨落, 上下, 动摇 vt. 使动摇, 使波动, 使起伏 )]  [vacillate( v. 犹豫不定 )]  [waver( n. 动摇, 开始退让, 踌躇, 挥动者 vi. 摇摆, 颤抖, 摆动, 摇曳, 犹豫 )]  )
• 
  注释列句：move or sway in a rising and falling or wavelike pattern; "the line on the monitor vacillated"
• 上位词 -> [swing]  [change( n. 改变, 变化, 转变, 找回的零钱, 找头, 辅币 vt. 改变, 变革, 改造, 兑换 )] 
• 派生词 -> [vacillation( n. 摇摆游移不定, 踌躇, 不果断 )]