Definition of "undeceivable" [undeceivable]

• Not deceivable. (adjective)

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• "His positive response to skepticism, however, takes the mind to be undeceivable with regard to its ideas."
• "The conductor came down the car, picking out Troubletonians with his undeceivable eye, and leaned toward us with outstretched fingers."
• "From this fact also spring the numerous anecdotes concerning the wild rulers of uncultivated people, who simply read the guilt of the suspect from his external behavior, or even more frequently were able to select the criminal with undeceivable acuteness from a number brought before them."