tentatively
US /ˈten.t̬ə.t̬ɪv.li/
UK /ˈten.t̬ə.t̬ɪv.li/

1.
subject to further confirmation; not definitely
:
•
We have tentatively scheduled the meeting for next Tuesday.
•
The new policy was tentatively approved, pending final review.
2.
in a hesitant or uncertain way
:
•
He tentatively reached out his hand to touch the strange object.
•
She smiled tentatively, unsure of his reaction.