Synonyms and related words :
guileless, unaffected, unassumed, unassuming, unbeguileful, unbeguiling, uncalculating, undeceiving, undeceptive, undesigning, undisguised, undisguising, undissembling, undissimulated, undissimulating, unfeigned, unfeigning, unflattering, unpretended, unpretending, untrimmed, unvarnished