Bluntness
Etymology
From "blunt" (dull, not sharp), of obscure Middle English origin. The metaphor is edged: a blunt instrument delivers force without a fine point, and blunt speech likewise lands with impact but no finesse.
noun · /BLUNT-nuss/
The habit of speaking plainly and directly, without softening the message.
What it names
Directness stripped of diplomatic padding — a style that can read as refreshing honesty or careless rudeness.
Example
She valued his bluntness in reviews — no guessing what he really thought — even when it stung.
Related idea
Bluntness is honesty delivered without cushioning; candor is honesty offered in good faith and often with care, so one can be candid without being blunt, and blunt without being kind.