Dull
Thickheaded
い adjective
にぶい, のろい
呪い (のろい) Curse
鈍い (にぶい、のろい) Dull, Thickheaded
鋭い (するどい) Sharp
不振 (ふしん) A Slump, Sluggish
鈍感 (どんかん) Insensitive, Thickheaded, Obtuse
偏狭 (へんきょう) Narrow Minded, Intolerance
渋い (しぶい) Bitter Flavor, Bitter
Being Thickheaded 鈍い is a Curse 呪い
にぶい means Dull, and sounds like someone fussing about it. のろい means Thickheaded, which is like a curse 呪い