Blade

лопа́тка

lopátka

(flat, functional end of a tool or utensil, such as a propeller, oar, hockey stick, screwdriver, or skate)

острие́

ostrié

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

перо́

peró

(flat, functional end of a tool or utensil, such as a propeller, oar, hockey stick, screwdriver, or skate)