钝 /dùn/ angolul

blunt [blunter, bluntest]▼(having a thick edge or point, not sharp)
adjective
[UK: blʌnt] [US: ˈblənt]

dull [duller, dullest]▼(lacking the ability to cut easily; not sharp)
adjective
[UK: dʌl] [US: ˈdəl]

obtuse [obtuser, obtusest]▼(geometry: larger than 90° but less than 180°)
adjective
[UK: əb.ˈtjuːs] [US: abˈtuːs]