1. (a.) Not decisive; not bringing to a final or ultimate issue; as, an indecisive battle, argument, answer.

2. (a.) Undetermined; prone to indecision; irresolute; unsettled; wavering; vacillating; hesitating; as, an indecisive state of mind; an indecisive character.

adrift afloat agnostic aleatoric aleatory alternating ambiguous ambitendent ambivalent amorphic amorphous anarchic at loose ends baggy bland blobby blurred blurry borderline broad capricious chance chancy changeable changeful chaotic characterless confused desultory deviable dicey disordered disorderly dizzy double-minded doubtful doubting dubious eccentric equivocal erratic faltering fast and loose featureless fence-sitting fence-straddling fickle fitful flickering flighty flitting fluctuating foggy formless freakish fuzzy general giddy groundless halfhearted halting hazy hesitant hesitating hit-or-miss ill-defined impetuous imprecise impulsive inaccurate incalculable inchoate incoherent inconclusive inconsistent inconstant indefinable indefinite indemonstrable indeterminable indeterminate indistinct inexact infirm infirm of purpose infirm of will inform insipid irregular irresolute irresolved irresponsible kaleidoscopic lax loose lumpen mazy mercurial milk-and-water milky misty moody moot mugwumpian mugwumpish mushy mutable namby-pamby neutral nondescript nonspecific not following not proved obscure of two minds open orderless polysemous problematic rambling random restless roving scatterbrained shadowed forth shadowy shaky shapeless shifting shifty shilly-shallying shuffling skeptical spasmodic spineless stochastic sweeping tasteless tentative tergiversating touch-and-go unaccountable unascertained unattested unauthenticated uncertain uncertified unclear unconfirmable unconfirmed uncontrolled unconvinced uncorroborated undecided undefined undemonstrated undependable undestined undetermined undisciplined undivinable unestablished unfixed unforeseeable unfounded unordered unorganized unpersuaded unplain unpredictable unprovable unproved unproven unreliable unresolved unrestrained unsettled unshown unspecified unstable unstable as water unstaid unsteadfast unsteady unsubstantiated unsupported unsupported by evidence unsure unsustained untested untried unvalidated unverifiable unverified vacillating vagrant vague vapid variable veiled vicissitudinary vicissitudinous volatile wandering wanton watery wavering wavery wavy wayward whimsical wishy-washy without basis without grounds