unforeseeable (adj.)

• accidental
• adventitious
• agnostic
• aleatory
• ambiguous
• capricious
• casual
• causeless
• chance
• chancy
• changeable
• contingent
• dicey
• doubting
• equivocal
• erratic
• extraordinary
• fatal
• fickle
• fluky
• fortuitous
• hesitant
• hesitating
• iffy
• improbable
• incalculable
• incidental
• indecisive
• indeterminate
• irresolute
• out-of-the-way
• polysemous
• risky
• skeptical
• sudden
• touch-and-go
• unaccountable
• unannounced
• unanticipated
• uncaused
• uncertain
• unconvinced
• undetermined
• unexpected
• unforeseen
• unheralded
• unlooked-for
• unpersuaded
• unpredictable
• unpredicted
• unprovable
• unsure
• unverifiable
• variable
• wavering
• whimsical