unguessable
/ʌnˈɡɛsəbəl/
adjective
- Impossible to guess or figure out; not able to be predicted or known.
- The outcome of the election seemed unguessable until the very last votes were counted.
- Her next move in the game was unguessable, keeping everyone on edge.
- The answer to the riddle was completely unguessable, even for the smartest students.
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