Definition of tentativeness in English:

tentativeness

Pronunciation /ˈten(t)ədivnəs/ /ˈtɛn(t)ədɪvnəs/

noun

See tentative

‘However, he played with some uncertainty and tentativeness, and no one is sure just how durable he will be.’
  • ‘It has a kind of pre-meditated tentativeness; a deliberate uncertainty.’
  • ‘Despite the tentativeness of the headline, do not doubt that the mediation will occur.’
  • ‘And it was this tentativeness which was his downfall.’
  • ‘The performance I attended was the first preview, which perhaps partially accounts for a tentativeness in the acting.’