Source : Webster's Revised Unabridged Dictionary (1913)

Dearn \Dearn\, a. [AS. derne, dyrne, dierne, hidden, secret. Cf.
   {Derne}.]
   Secret; lonely; solitary; dreadful. [Obs.] --Shak. --
   {Dearn"ly}, adv. [Obs.] --Chaucer.