Definition of "unguessable" [unguessable]

• Not capable of being guessed. (adjective)

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• "Denise Gough's nanny is desolate, needy and capable: compelling because she is so unguessable."
• "I have a friend who (for some unguessable reason) collects cellphones and LED watches and calculators and various other sorts of crap, and one of the things he was yammering on about was how uber-cool his “smartphone” was."
• "A definite soul, or entity, or spirit-thing glimmered behind his dog's eyes, already fond with affection for this hair-grizzled god who talked with him he knew not what, but whose very talking carried delicious and unguessable messages to his heart."