The Collaborative International Dictionary of English v.0.48:

Uncordial \Uncordial\
   See cordial.

WordNet (r) 3.0 (2006):

uncordial
    adj 1: lacking warmth or friendliness; "looked uncordial as we
           approached"

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "uncordial":
   chill, chilly, closed, cold, cool, disaccordant, disagreeable,
   frosty, icy, ill, incompatible, inhospitable, inimical, strained,
   tense, unaffectionate, unamiable, unamicable, unbenign,
   unbenignant, uncompassionate, uncompassioned, unfriendly, ungenial,
   ungracious, unharmonious, unhospitable, unkind, unkindly, unloving,
   unneighborly, unreceptive, unsociable, unsympathetic,
   unsympathizing