资料来源 : Webster's Revised Unabridged Dictionary (1913)

Naif \Na"["i]f`\ (?; formerly ?), a. [F. na["i]f. See
   {Na["i]ve}.]
   1. Having a true natural luster without being cut; -- applied
      by jewelers to a precious stone.

   2. Na["i]ve; as, a na["i]f remark. --London Spectator.

资料来源 : WordNet®

naif
     adj : 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" [syn: {naive}]
           [ant: {sophisticated}]