What is the prefix of hesitation?

There isn't a single, universally accepted prefix for "hesitation." However, some possibilities include:

* In-: This prefix often indicates negation or lack of, so "inhesitation" could be a theoretical term meaning "lack of hesitation." This is not a common word.

* Un-: Similar to "in-," this prefix could be used to indicate the absence of something. So, "unhesitation" might mean "without hesitation." Again, this isn't a standard term.

Ultimately, the most common way to describe the lack of hesitation is through words like "confidence," "certainty," "readiness," or "promptness."