uncertain adj.

1 not confident

VERBS be, feel, look, seem | become

ADV. deeply, very I feel deeply uncertain about the future. | a little, rather, slightly | strangely

PREP. about, as to He seemed strangely uncertain as to how to continue. | of We were rather uncertain of the direction it came from.

2 not known exactly

VERBS be, look | become | remain, seem

ADV. extremely, highly, very | increasingly | quite, rather, somewhat | still Whether diet is an important factor in this illness is still uncertain. | inevitably, inherently The world is inherently uncertain. | notoriously Cost estimates are notoriously uncertain in this business.