uncertain

epäluotettava, sattumanvarainen

epävarma Not certain; unsure.
(w) (1630-1694)

Man, without the protection of a superior Being,(..)is uncertain of everything that he hopes for.

(ux)

Turning back, then, toward the basement staircase, she began to grope her way through blinding darkness, but had taken only a few uncertain steps when, of a sudden, she stopped short and for a little stood like a stricken thing, quite motionless save that she quaked to her very marrow in the grasp of a great and enervating fear.

O woman! in our hours of ease, / Uncertain, coy, and hard to please!

Thinking about the uncertain refines our perception of the certain, and generally this takes place in a framework in which the uncertain is the future and the certain is the present.