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apprehensive
anxious or fearful about the future; uneasy
categorical
1 without exception or qualification; absolute
2 done according to types; arranged by categories
conclusive
decisive; putting an end to doubt, question, or uncertainty
dubious
doubtful; uncertain; questionable as to quality or validity
indeterminate
1 not capable of being determined or established; not precisely known
2 lacking clarity or precision; vague
precarious
1 dangerous; risky; lacking in security or stability
2 based on uncertain or questionable premises
qualm
a sense of doubt or uneasiness about a course of action
tentative
uncertain; not fully worked out or agreed upon; provisional
unequivocal
perfectly clear; leaving no room for doubt or misunderstanding
vacillate
1 to swing indecisively from one opinion or action to another
2 to sway or gesitate in choice of actions or opinions
apprehensive
anxious or fearful about the future; uneasy
categorical
1 without exception or qualification; absolute
2 done according to types; arranged by categories
conclusive
decisive; putting an end to doubt, question, or uncertainty
dubious
doubtful; uncertain; questionable as to quality or validity
indeterminate
1 not capable of being determined or established; not precisely known
2 lacking clarity or precision; vague
precarious
1 dangerous; risky; lacking in security or stability
2 based on uncertain or questionable premises
qualm
a sense of doubt or uneasiness about a course of action
tentative
uncertain; not fully worked out or agreed upon; provisional
unequivocal
perfectly clear; leaving no room for doubt or misunderstanding
vacillate
1 to swing indecisively from one opinion or action to another
2 to sway or gesitate in choice of actions or opinions