amiability

from WordNet (r) 3.0 (2006)

amiability
    n 1: a cheerful and agreeable mood [syn: {good humor}, {good
         humour}, {good temper}, {amiability}] [ant: {distemper},
         {ill humor}, {ill humour}]
    2: a disposition to be friendly and approachable (easy to talk
       to) [syn: {affability}, {affableness}, {amiability},
       {amiableness}, {bonhomie}, {geniality}]

from The Collaborative International Dictionary of English v.0.48

Amiability \A`mi*a*bil"i*ty\, n.
   The quality of being amiable; amiableness; sweetness of
   disposition.
   [1913 Webster]

         Every excellency is a degree of amiability. --Jer.
                                                  Taylor.
   [1913 Webster]