Answer: surest

AnswerCrossword Clue
SURESTLeast dubious
SUREST"... thing you know"
SURESTLeast doubtful
SURESTLeast equivocal
SURESTLeast vacillating
SURESTLike the risk to bet on, maybe
SURESTOptimal, as a bet
SURESTSuperlatively decided
SURESTMost indisputable
SURESTBest, as a bet
SURESTMost likely to work
SURESTMost positive
SURESTHaving the best hands
SURESTLeast in question
surestSURE, free from doubt
surestCertain to do something
surestTrue beyond any doubt
surestConfident; assured
surestConfident in what one thinks or knows; having no doubt that one is right
surestHaving a certain prospect or confident anticipation of
surestAble to be relied on or trusted
SURESTLeast iffy
SUREST"The .. poison is time....": Emerson
SURESTMost certain
SURESTMost reliable
SURESTSuperlatively self-confident
SURESTMost dependable
SURESTMost likely
SURESTMost confident
SURESTLike the best bet
SURESTMost convinced
SURESTMost definite
SUREST"The .. poison is time.": Emerson
SURESTMost likely to succeed
SURESTMost infallible.
SURESTMost reliable.
SURESTMost confident.
SURESTMost stable.
SURESTMost certain.
SURESTMost dependable.