IPA: /ˈblʌnt.nəs/
KK: /blʌntnəs/
The quality of being straightforward and honest in speech or behavior, often without concern for how it may affect others.
Her bluntness sometimes hurt people's feelings, but she always spoke her mind.
Bluntness is formed from "blunt" (from Old French *blunt*, meaning dull or not sharp) and "-ness" (meaning the state or quality of). The word "bluntness" refers to the quality of being dull or lacking a sharp edge.
Think of the word 'blunt' meaning not sharp, and remember that 'bluntness' describes the state of being dull.