Blade

blað

(typically sharp-edged working end of a knife or other cutting tool)

blað

(a weapon such as a dagger)

blað

(the flat part of a leaf or petal)

egg

(typically sharp-edged working end of a knife or other cutting tool)

egg

(a weapon such as a dagger)

egg

(thin plate, foil)

sverð

(a weapon such as a dagger)