tentativeness
noun /ˈtentətɪvnəs/
  /ˈtentətɪvnəs/
[uncountable]- the state of not being definite or certain because you may want to change it later- The reason for the tentativeness of these conclusions is clear.
 
- the fact of not behaving or being done with confidence synonym hesitancy- He played with some uncertainty and tentativeness.