naive
naive (na*ēv") , adjective
[French naif, fem. naive, from Latin nativus innate, natural, native. See Native, and compare Naif.]
1.
Having native or unaffected simplicity; ingenuous; artless; frank; as, naive manners; a naive person; naive and unsophisticated remarks.
2.
Having a lack of knowledge, judgment, or experience; especially, lacking sophistication in judging the motives of others; credulous; as, a naive belief in the honesty of politicians.