资料来源 : pyDict

未受指导的,无收件人姓名的

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

Undirected \Un`di*rect"ed\, a. [In senses 1 and 2, pref. un- not
   + directed; in sense 3 properly p. p. of undirect.]
   1. Not directed; not guided; left without direction.

   2. Not addressed; not superscribed, as a letter.

   3. Misdirected; misled; led astray. [R.]

资料来源 : WordNet®

undirected
     adj : aimlessly drifting [syn: {adrift(p)}, {afloat(p)}, {aimless},
            {directionless}, {planless}, {rudderless}]