NAIF
naive, naif
(adjective) marked by or showing unaffected simplicity and lack of guile or worldly experience; “a teenager’s naive ignorance of life”; “the naive assumption that things can only get better”; “this naive simple creature with wide friendly eyes so eager to believe appearances”
naif
(noun) a naive or inexperienced person
Source: WordNet® 3.1
Etymology
Adjective
naif (comparative naifer, superlative naifest)
Naive.
Noun
naif (plural naifs)
One who is naive.
Anagrams
• Fain, an if, fain, fina
Source: Wiktionary
Na"ĂŻf` (formerly , a. Etym: [F. naĂŻf. See NaĂŻve.]
1. Having a true natural luster without being cut; -- applied by
jewelers to a precious stone.
2. NaĂŻve; as, a naĂŻf remark. London Spectator.
Source: Webster’s Unabridged Dictionary 1913 Edition