hesitate

This word captures a momentary suspension of action driven by internal conflict, doubt, or anxiety. It describes the psychological gap between the intention to act and the execution of that act, often manifesting as a physical pause or a stutter in speech.

In professional correspondence, the phrase "do not hesitate" is a standard polite formula used to encourage communication. In this context, the word shifts from describing a literal pause to addressing a potential feeling of reluctance or social awkwardness in the recipient.