Synonyms and related words :
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