tentative (adj.)

• acting
• alternate
• alternative
• ambling
• analytic
• apprehensive
• awkward
• callow
• canny
• careful
• cautious
• circumspect
• counterfeit
• dangerous
• deliberate
• desultory
• determined
• diffident
• discreet
• disinclined
• dumb
• dummy
• easy
• empirical
• empty
• empty-headed
• equivalent
• ersatz
• examining
• experimental
• explorative
• exploratory
• fact-finding
• fake
• faltering
• feeling
• flagging
• gauche
• gentle
• gingerly
• gradual
• green
• groping
• guarded
• halting
• hazardous
• heedful
• hesitant
• hesitating
• heuristic
• hit-or-miss
• idle
• ignorant
• imitation
• improvised
• inane
• indecisive
• indolent
• inexperienced
• infirm
• innocent
• insecure
• insubstantial
• interim
• investigative
• investigatory
• irresolute
• judicious
• jury-rigged
• languid
• languorous
• lazy
• leisurely
• lumbering
• makeshift
• mindful
• mock
• moderate
• naive
• nescient
• noncommittal
• pawky
• perilous
• phony
• poky
• politic
• precarious
• probationary
• probative
• probatory
• proving
• provisional
• provisory
• prudent
• raw
• regardful
• relaxed
• reluctant
• resolute
• risky
• safe
• secondary
• shaky
• shifting
• shifty
• shy
• simple
• slack
• slippery
• slothful
• slow
• slow-moving
• sluggish
• spare
• speculative
• staggering
• sticking
• straining
• substitute
• temporary
• test
• thorough
• ticklish
• timid
• token
• tottering
• treacherous
• trial
• trial-and-error
• trying
• unacquainted
• unadventurous
• uncertain
• uncommunicative
• uncomprehending
• undependable
• uneasy
• unenlightened
• unenterprising
• unfamiliar
• unhurried
• unilluminated
• uninformed
• uninitiated
• unintelligent
• unknowing
• unreliable
• unsound
• unstable
• unsteady
• unsubstantial
• unsure
• untrustworthy
• unversed
• utility
• vacuous
• venturesome
• verificatory
• vicarious
• willing
• wobbly