перо́ — meaning in English

pero

English meaning

blade noun The flat, sharp-edged cutting part of a knife, sword, or similar tool.
feather noun One of the light, branching structures covering a bird's body, used for flight and insulation.
fin noun One of the flat, wing-like parts on a fish or marine animal used for swimming and steering.
knife noun A tool with a flat, usually metal blade sharpened along one edge and fixed to a handle, used for cutting.
pen noun A handheld tool used for writing or drawing with ink.
plume noun A large, often decorative feather, or a cluster of feathers.
quill noun The hollow central shaft of a bird's feather.

перо́ is used for these senses in English:

blade (mathematics) An exterior product of vectors. (The product may have more than two factors. Also, a scalar counts as a 0-blade, a vector as a 1-blade; an exterior product of k vectors may be called a k-blade.)
feather A branching, hair-like structure that grows on the bodies of birds, used for flight, swimming, protection and display.
feather One of the fins or wings on the shaft of an arrow.
fin (ichthyology, zootomy) One of the appendages of a fish, used to propel itself and to manoeuvre/maneuver.
knife A weapon designed with the aforementioned specifications intended for slashing or stabbing but too short to be called a sword; a dagger.
pen A tool, originally made from a feather but now usually a small tubular instrument, containing ink used to write or make marks.
plume (archaic, literary, and, poetic) A feather of a bird, especially a large or showy one used as a decoration.
quill A pen made from a feather.

noun The flat, sharp-edged cutting part of a knife, sword, or similar tool.
noun A flat, thin part shaped like a cutting blade, such as of a fan, propeller, oar, or grass.
verb To skate using inline skates ("rollerblades").

noun One of the light, branching structures covering a bird's body, used for flight and insulation.
verb To turn an oar or propeller blade so its edge cuts through air or water with less resistance.