tentative
adjective
uk/ˈtentətɪv/ usnot certain or agreed:
The car company and the union reached a tentative agreement.
a tentative deal/plan/settlement
The proposals are tentative and subject to bargaining.
said or done in a careful way because you do not know if you are right:
While analysts are tentative at the moment, they remain basically optimistic.
The company began last year to take tentative steps towards a flotation.
tentatively
adverb
They have tentatively agreed to the proposal.