bluntest
blun-test
adjective
Most direct or outspoken, often without politeness or subtlety.
"His bluntest criticism was surprisingly helpful."
Thesaurus
Synonyms: dull, blunt, frank, free-spoken, plainspoken, point-blank, candid, straight-from-the-shoulder, direct, forthright, outspoken, pointless
Antonyms: animate, enliven, invigorate, liven, liven up, sharpen