The Collaborative International Dictionary of English v.0.48:

Cozier \Co*zier\ (k?"zh?r), n.
   See Cosier.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cozy \Co"zy\ (k?"z?), a. [Compar. Cozier (-z?-?r); superl.
   Coziest.] [Cf. Scot. cosie, cozie, prob. from Gael. cosach
   abounding in hollows, or cosagach full of holes or crevices,
   snug, sheltered, from cos a hollow, a crevice.]
   [1913 Webster]
   1. Snug; comfortable; easy; contented. [Written also cosey
      and cosy.]
      [1913 Webster]

   2. [Cf. F. causer to chat, talk.] Chatty; talkative;
      sociable; familiar. [Eng.]
      [1913 Webster]