Synonyms of tentative

Adjective

1. probationary, provisional, provisionary, tentative, conditional (vs. unconditional)

usage: under terms not final or fully worked out or agreed upon; "probationary employees"; "a provisional government"; "just a tentative schedule"

2. doubtful, tentative, unsettled (vs. settled)

usage: unsettled in mind or opinion; "drew a few tentative conclusions"

Definition and meaning of tentative (Dictionary)