(v.) = shake ; waver ; falter ; vacillate ; hang back ; oscillate ; baulk [balk, -USA] ; wobble ; dilly-dally ; shilly-shally ; dither ; think + twice ; give it + a second thought ; miss + a beat ; skip + a beat ; teeter.
Ex: This attitude had to go and by the 1830s it was shaking.
Ex: The first decision in establishing headings for the works of corporate bodies is the one over which code makers have wavered.
Ex: The project faltered because the data became increasingly difficult to input and manipulate.
Ex: Australia's treatment of information technology has vacillated between laissez faire and an interventionist strategy.
Ex: This article explores the implications of these threats, maintaining that publishers cannot afford to hang back, but must innovate or atrophy.
Ex: This dichotomy in Muslim history, which has oscillated between periods of piousness & decadence, demonstrates further disunity in the Muslim world.
Ex: While many scholars concede that military interventions are sometimes permissible, they balk when it comes to deciding whether they are ever a moral duty.
Ex: This adaptation of David Leavitt's novel wobbles between comedy and melodrama, ultimately fudging the novel's spiky empathy.
Ex: When it comes to volcanoes, there's no time to dilly-dally.
Ex: Their faces show the stern resolve and strength of people who have no time to shilly-shally.
Ex: The Executive Board has been dithering over the control of the search for the next executive director = La Junta Directiva ha estado dudando si controlar o no la elección del siguiente director ejecutivo.
Ex: I would urge you most sincerely and strongly to think twice or three times before putting your shelflist into an undeveloped system.
Ex: If I had known it would be like this I might have given it a second thought.
Ex: The implementation was a very smooth process, we did not miss any orders -- our business did not miss a beat.
Ex: It looked like he didn't skip a beat, kind of stepped in there and looked like he had been in there for a month.
Ex: Other data from observations and interviews suggest that this seemingly effective local management system may be beginning to teeter.
----
* sin vacilar = unswervingly.
* vacilar entre... y/o... = hover between... and/or....

The following video provides you with the correct English pronunciation of the word "vaciló", to help you become a better English speaker.

nm. dither, vacillation, hesitation

v. vacillate, sway to and fro, fluctuate; hesitate, waver

schwankte;zögerte;zauderte

v. vacillate, hesitate; waver

I hesitate

he/she hesitated