The Collaborative International Dictionary of English v.0.48:

Endear \En*dear"\, v. t. [imp. & p. p. Endeared; p. pr. & vb.
   n. Endearing.]
   1. To make dear or beloved. "To be endeared to a king."
      --Shak.
      [1913 Webster]

   2. To raise the price or cost of; to make costly or
      expensive. [R.] --King James I. (1618).
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Endearing \En*dear"ing\, a.
   Making dear or beloved; causing love. -- En*dear"ing*ly,
   adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

endearing
    adj 1: lovable especially in a childlike or naive way [syn:
           adorable, endearing, lovely]