tentative Synonyms

doubtful provisional hesitating temporary interim probationary experimental iffy unresolved unconfirmed hesitant uncertain undecided preliminary unsure provisionary cautious speculative conditional vacillating vacillatory wavering weak rough vacillant shaky trial shy transitional stuttering theoretic timid suppositional teetering test working unsettled unproven unconvinced untested untried up in the air subject to confirmation subject to change lacking confidence not final not settled on the fence investigational beta