Hesitancy (noun)

1. The state or quality of being hesitant or uncertain.
2. A reluctance or unwillingness to do something.

Origin:

The word "hesitancy" comes from the word "hesitant" which comes from the latin word "haesitare" meaning "to stick, cling or adhere". it refers to a state or quality of being hesitant or uncertain.

Examples:

1. He spoke with hesitancy, unsure of how to proceed.
2. The hesitancy in her voice betrayed her lack of confidence.
3. There was a hesitancy in his movements as he approached the stage.