Learn how to say Blitheness correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word blithe:
showing a casual and cheerful indifference considered to be callous or improper:
a blithe disregard for the rules of the road
literary happy or carefree:
a blithe seaside comedy
adjective ( literary)
Old English blīthe, of Germanic origin; related to Dutch blijde, also to bliss