co·zy also co·sy 
(kōzē)
(kōzē)adj. co·zi·er, co·zi·est also co·si·er or co·si·est
1. Snug, comfortable, and warm. See Synonyms at comfortable.
2. Marked by friendly intimacy: a cozy chat.
3. Informal Marked by close association for devious purposes: a cozy agreement with the competition.
v. co·zied, co·zy·ing, co·zies also co·sied or co·sy·ing or co·sies
v.intr.
1. To make oneself snug and comfortable: cozy up with the Sunday paper.
2. Informal To try to get on friendly or intimate terms; ingratiate oneself: "out on the ... hustings, cozying up to reactionaries and racists alike" (Chuck Stone).
v.tr.
Informal To cause to appear comfortable or conducive to intimacy: added some pillows to cozy up the room.
n. pl. co·zies also co·sies
1. A padded or knitted covering placed over an item, especially a teapot, to keep it hot.
2. A hollow cylindrical holder, usually made of foam rubber or a similar soft material, used to keep a beverage cold while being held.
[Probably of Scandinavian origin.]
cozi·ly adv.
cozi·ness n.