How to Say "to waver" in Spanish
The most common Spanish word for “to waver” is “dudar” — use 'dudar' when you are unable to decide between options, indicating a mental hesitation or indecision..
dudar
/doo-DAHR//duˈðar/

Examples
No dudé en aceptar la invitación.
I didn't hesitate to accept the invitation.
No dudó ni un segundo en saltar al agua.
He didn't hesitate for a second to jump into the water.
Dudó un momento antes de entrar.
She hesitated for a moment before entering.
Hesitation with 'en'
When you say you don't hesitate 'to do' something, Spanish uses the word 'en' followed by the verb: 'No dudes en llamarme'.
vacilar
/ba-see-lar//baθiˈlaɾ/

Examples
El barco vaciló en las olas.
The boat wavered on the waves.
No vaciló ni un segundo en aceptar la oferta.
He didn't hesitate for a second in accepting the offer.
La llama de la vela empezó a vacilar por el viento.
The candle flame started to flicker because of the wind.
Vaciló un momento antes de responder a la pregunta.
She wavered for a moment before answering the question.
Using 'en'
When you hesitate to do something, use 'en' followed by the action: 'Vaciló en comprarlo' (He hesitated to buy it).
Cognate Confusion
Mistake: “Thinking it only means 'to vacillate' (hesitate).”
Correction: Remember that in conversation, it almost always means 'to tease' or 'to party' depending on the country!
tambalear
/tam-bah-leh-AHR//tamba-leˈaɾ/

Examples
Su confianza empezó a tambalearse.
His confidence began to waver.
La economía del país empezó a tambalear tras la crisis.
The country's economy began to falter after the crisis.
Sus argumentos hicieron tambalear la teoría del científico.
His arguments made the scientist's theory waver.
El gobierno se tambalea debido a las recientes protestas.
The government is shaky due to recent protests.
Abstract Subjects
When used figuratively, the subject of the sentence is often something you can't touch, like 'the economy' (la economía) or 'his confidence' (su confianza).
Don't confuse with 'dudar'
Mistake: “Using 'tambalear' for a person's simple hesitation between two choices.”
Correction: Use 'dudar' if a person can't decide. Use 'tambalear' if their entire support system or confidence is being shaken.
Hesitation vs. Instability
Related Translations
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