tentative

Synonyms: acting ad interim conjectural contingent dependent iffy indefinite makeshift not final not settled on trial open for consideration probationary provisional provisionary provisory speculative subject to change temporary test trial unconfirmed undecided unsettled

Antonyms: certain decisive definite final sure

Synonyms: backward cautious diffident disinclined doubtful faltering halting hesitant irresolute reluctant timid undecided unsure vacillating vacillatory wobbly

Antonyms: certain conclusive definite sure