Not suspicious.

synonym: unsuspecting.

Roget 703: artless, natural, pure, native, confiding, simple, lain, inartificial^†, untutored, unsophisticated, ingenu^†, unaffected, naive; sincere, frank; open, open as day; candid, ingenuous, guileless; unsuspicious, honest etc. 939; innocent etc. 946; Arcadian^†; undesigning, straightforward, unreserved, aboveboard; simple-minded, single-minded; frank-hearted, open-hearted, single-hearted, simple-hearted.    free-spoken, plain-spoken, outspoken; blunt, downright, direct, matter of fact, unpoetical^†; unflattering.    ... show more

Roget 858: hoping etc. v.; in hopes etc. n.; hopeful, confident; secure etc. (certain) 484; sanguine, in good heart, buoyed up, buoyant, elated, flushed, exultant, enthusiastic; heartsome^†; utopian.    unsuspecting, unsuspicious; fearless, free from fear, free from suspicion, free from distrust, free from despair, exempt from fear, exempt from suspicion, exempt from distrust, exempt from despair; undespairing^†, self reliant.    probable, on the high road to; within sight of shore, within sight of land; promising, propitious; of promise, full of promise; of good omen; auspicious, de bon augure [Fr.]; reassuring; encouraging, cheering, inspiriting, looking up, bright, roseate, couleur de rose [Fr.], rose-colored.    ... show more

Roget 484: believing etc. v.; certain, sure, assured, positive, cocksure, satisfied, confident, unhesitating, convinced, secure.    under the impression; impressed with, imbued with, penetrated with.    confiding, suspectless^†; unsuspecting, unsuspicious; void of suspicion; credulous etc. 486; wedded to.    believed etc. v.; accredited, putative; unsuspected.    worthy of, deserving of, commanding belief; credible, reliable, trustworthy, to be depended on; satisfactory; probably etc. 472; fiducial^†, fiduciary; persuasive, impressive.    relating to belief, doctrinal.    ... show more