naive[nɑːíːv] a.천진난만한, 순진한, 때묻지 않은, 소박한, 고지식한; 우직한, 잘속는; 미경험의; 특정 실험[투약]을 받은 적이 없는.
If you describe someone as naive, you think they lack experience and so expect things to be easy or people to be honest or kind.