unsuspecting

From un- +‎ suspecting.

unsuspecting (comparative more unsuspecting, superlative most unsuspecting)

1. Not suspecting; without any suspicion.

   He easily shot the unsuspecting target.

   • 1913, Edgar Rice Burroughs, The Return of Tarzan, New York: Ballantine Books, published 1963, page 193:

     One by one grotesque forms emerged from the jungle to creep stealthily upon the unsuspecting woman.

   • 1999 April 5, William Safire, “Essay; The Quiet Noisemaker”, in The New York Times‎^[1], archived from the original on 14 September 2017:

     Before long, the unsuspecting salesman was earnestly pitching him "the quietest noisemaker on the market."

   • 2008 June 20, Edward Rothstein, “Critters of a Wondrous Isle, Meet Your Friend and Foe”, in The New York Times‎^[2], archived from the original on 4 January 2022:

     To unsuspecting eyes these mongoose relatives can seem eminently pettable.