tentative

A trial; an experiment; an attempt.

A schedule for an event or a programme.

Of or pertaining to a trial or trials; essaying; experimental.

Uncertain; subject to future change.

He gave a tentative answer, unsure of the final outcome.

We have a tentative plan for the weekend, but nothing is confirmed yet.

Restrained; polite; feeling one's way, not using full force.

Her tentative steps showed her nervousness as she entered the room.