I hesitate
Definitions
To pause before saying or doing something due to uncertainty, reluctance, or indecision.
To be slow to act or speak out of nervousness or lack of confidence.
Examples
I hesitate to accept the offer until I have more information.
Whenever I hesitate to speak up, I often regret it later.
I hesitate to walk through the dark forest alone at night.
Synonyms
I waver I vacillate I pause I falter I dither I oscillate I stall