IPA: /ˈkoʊzɪnəs/
KK: /ˈkoʊzɪnəs/
The state of being comfortable, warm, and relaxed in a pleasant environment.
On a rainy day, I love to enjoy the cosiness of my living room with a good book.
Cosiness is derived from "cozy" (from the Scottish word "cosy", meaning comfortable or snug) and the suffix "-ness" (meaning the state or quality of). The word "cosiness" refers to the state of being comfortable and snug.
Think of the word 'cozy' which means comfortable, and remember that 'cosiness' describes the quality of being cozy.