名詞 waver:

1. someone who communicates by waving
2. the act of pausing uncertainly
   同義詞：hesitation, falter, faltering
3. the act of moving back and forth
   同義詞：flutter, flicker

動詞 waver:

1. pause or hold back in uncertainty or unwillingness
   同義詞：hesitate, waffle
2. be unsure or weak
   同義詞：falter
3. move hesitatingly, as if about to give way
   同義詞：falter
4. move or sway in a rising and falling or wavelike pattern
   同義詞：fluctuate, vacillate
5. move back and forth very rapidly
   同義詞：flicker, flitter, flutter, quiver
6. sway to and fro
   同義詞：weave
7. give off unsteady sounds, alternating in amplitude or frequency
   同義詞：quaver

1. They did not waver in their support for him.
   他們毫不動搖地支持他。
2. His courage never wavered.
   他的勇氣從未減弱。
3. While we were wavering, somebody else bought the house.
   就在我們猶豫不決的時候，別人把那所房子買下了。
4. Her steady gaze did not waver.
   她目不轉(zhuǎn)睛地注視著。
5. The disaster caused him to waver in his faith.
   這件災難使他對信仰發(fā)生了動搖。

wa.ver

v.intr.（不及物動詞）
wa.vered,wa.ver.ing,wa.vers
To move unsteadily back and forth.See Synonyms at swing
搖晃：來回不穩(wěn)地晃動參見 swing

To exhibit irresolution or indecision; vacillate:
猶豫不決：表現(xiàn)出猶豫或舉棋不定；動搖：
例句：
wavered over buying a house.See Synonyms at hesitate
在買房上猶豫不決參見 hesitate

To become unsteady or unsure; falter:
動搖：變得不穩(wěn)固或沒有把握；動搖：
例句：
His resolve began to waver.
他的決心開始動搖了

To tremble or quaver in sound, as of the voice or a musical note.
顫抖：如嗓音或曲調(diào)等聲音抖動或顫抖
To flicker or glimmer, as light.
閃爍：光等搖曳或忽明忽暗
n.（名詞）
The act of wavering.
動搖的動作

來源：
Middle English waveren * see webh-
中古英語 waveren *參見 webh-

【引伸】
wa.verer
n.（名詞）
wa.veringly
adv.（副詞）