niepewny nieśmiały in English:

he eventually tried a few tentative steps round his hospital room

These recommendations are only tentative.

Keep in mind that this is a tentative application.

to sound tentative

Here is a tentative plan of what I want to do.

This time it was a tentative pull, not solid nor heavy.

If integrations are configured, the participants’ Microsoft Exchange Server calendar statuses are displayed including busy, out of the office, and tentative.

I'm taking the first tentative steps towards fitness.

The two companies have announced a tentative deal.

In the beginning of this game we were very tentative; Here is a tentative plan of what I want to do.

Her English is correct but tentative.

the first ever pupil knocked tentatively at the front door.

tentative truce

Attached is the tentative agenda.