from The Century Dictionary.
- noun The state of being unsuspected.
Sorry, no etymologies found.
Also he is possessed of an unexperienced freedom from suspectedness-of-ulterior-motive-in-others -- one may not in English as in German make the word to fit his need of the moment -- that unsuspectedness, I repeat, which has ever characterised the lamb about to be converted into nutrition.
Page 111 the secret of that unsuspectedness with which his multifarious operations were conducted.