1) Credulous 2) Gullible 3) Ignorant 4) Incautious 5) Innocent 6) Naive 7) Not knowing or expecting 8) Not suspicious 9) Not thinking likely 10) Reckless 11) Trustful 12) Trusting 13) Unaware 14) Unconscious 15) Unsuspicious 1) Gullible 2) Naive 3) Trustful 4) Trusting 5) Unaware 6) Unsuspicious 7) Unwitting 
[adj] - not suspicious 2. [adj] - (often followed by `of`) not knowing or expecting
unsuspicious adjective not suspicious; `deceiving the unsuspecting public`