waver
US /ˈweɪ.vɚ/
UK /ˈweɪ.vɚ/

1.
vacilar, hesitar, titubear
to be undecided between two opinions or courses of action; be irresolute
:
•
He started to waver on his decision to move abroad.
Ele começou a vacilar em sua decisão de se mudar para o exterior.
•
Her confidence began to waver as the deadline approached.
A confiança dela começou a vacilar à medida que o prazo se aproximava.