鈍どん刀とう

ど

ん

と

う

Meanings

1

dull sword; blunt sword

Literally a sword that is not sharp. Can also be used figuratively for a slow-witted person or ineffective method, though that usage is less common.

鈍どん刀とうでは硬かたいものを切きるのは難むずかしい。
It's hard to cut hard things with a dull sword.
彼かれの議ぎ論ろんは鈍どん刀とうのように切きれ味あじが悪わるい。
His argument lacks sharpness, like a blunt sword.