一刀[ittou] sword
一刀彫り[ittoubori] one-knife carving
一刀両断[ittouryoudan] cutting in two with a single stroke
印刀[intou] seal-engraving knife
円刃刀[enjintou] round-edged scalpel

快刀[kaitou] (literary) sharp sword
快刀乱麻[kaitouranma] solving a problem swiftly and skillfully
懐刀[futokorogatana] confidant
儀刀[gitou] ceremonial sword
軍刀[guntou] saber

土圭[tokihakari] watch
刀圭[toukei] doctor
刀圭家[toukeika] doctor

圭角のある[keikakunoaru] harsh-mannered
圭璧[keiheki] ritual jades worn by feudal lords in ancient China
尖圭コンジローム[senkeikonjiroomu] pointed condyloma