incalculable (adj.)

• able
• agnostic
• all-inclusive
• ambiguous
• boundless
• capricious
• chancy
• changeable
• countless
• dicey
• doubting
• endless
• enigmatic
• equivocal
• erratic
• eternal
• fickle
• hesitant
• hesitating
• illimitable
• immeasurable
• immense
• incognizable
• incomprehensible
• indecisive
• inestimable
• inexhaustible
• infinite
• innumerable
• interminable
• irresolute
• limitless
• measureless
• mysterious
• numberless
• perpetual
• polysemous
• puzzling
• sealed
• skeptical
• strange
• touch-and-go
• unaccountable
• unapparent
• unbeknown
• unbounded
• uncertain
• uncharted
• unclassified
• unconvinced
• uncounted
• undisclosed
• undiscoverable
• undiscovered
• unexplained
• unexplored
• unfamiliar
• unfathomable
• unfathomed
• unforeseeable
• unheard
• unheard-of
• unidentified
• universal
• unknowable
• unknown
• unlimited
• unmeasurable
• unmeasured
• unnumbered
• unperceived
• unpersuaded
• unplumbed
• unpredictable
• unprovable
• unrevealed
• unsure
• unsuspected
• untold
• untouched
• unverifiable
• variable
• virgin
• wavering
• whimsical