unsociable, Timonistic, aloof, antisocial, autistic, bashful, chill, chilly, close, cold, cool, cynical, disaccordant, disinclined to communicate, dissociable...
This is <span class="searchmatch">Moby</span> <span class="searchmatch">Thesaurus</span> <span class="searchmatch">II</span>, a public domain <span class="searchmatch">thesaurus</span>....