1. [adj]  under terms not final or fully worked out or agreed upon; "probationary employees"; "a provisional government"; "just a tentative schedule"
2. [adj]  unsettled in mind or opinion; "drew a few tentative conclusions"

TENTATIVE is a 9 letter word that starts with T.

1. \Ten*ta"tive\, a. [L. tentare to try: cf. F. tentatif.
   See {Tempt}.]
   Of or pertaining to a trial or trials; essaying;
   experimental. ``A slow, tentative manner.'' --Carlyle. --
   {Ten*ta"tive*ly}, adv.
   
   

2. \Ten*ta"tive\, n. [Cf. F. tentative.]
   An essay; a trial; an experiment. --Berkley.