unsuspecting (adj.)
- asleep
- childlike
- confiding
- credulous
- defenseless
- dependent
- doting
- fond
- guileless
- gullible
- helpless
- ignorant
- incognizant
- infatuated
- ingenuous
- innocent
- insensible
- mindless
- naive
- napping
- overcredulous
- reliant
- superstitious
- trustful
- trusting
- trusty
- unadvised
- unarmed
- unarmored
- unattended
- unaware
- unconscious
- uncovered
- uncritical
- undefended
- unguarded
- unhearing
- uninformed
- unknowing
- unmindful
- unperceiving
- unprepared
- unprotected
- unready
- unseeing
- unshielded
- unsuspicious
- unwary
- unwitting
- weaponless
- witless