artless bluff blunt born yesterday candid childlike confiding credulous dependent depending direct frank ingenu ingenuous innocent naive open openhearted outspoken plain reliant relying simple simplehearted simpleminded sincere single-hearted single-minded trustful trusting trusty unaffected unassumed unassuming unbeguileful unbeguiling uncalculating undeceitful undeceiving undeceptive undesigning undisguised undisguising undissembling undissimulated undissimulating unfeigned unfeigning unflattering unguarded unpretended unpretending unreserved unschooled unsophisticated unstudied unsuspecting unsuspicious untrimmed untutored unvarnished unwary without suspicion