penとは何ですか?An instrument for writing or drawing with ink or similar fluid, especially:A ballpoint pen.A fountain pen.A pen point.A penholder and its pen point.A quill.An instrument for writing regarded as a means of expression: "Tyranny has no enemy so formidable as the pen” ( William Cobbett). A writer or an author: a hired pen. A style of writing: wrote plays with a witty pen. Pinions.The chitinous internal shell of a squid.To write or compose with or as if with a pen.A fenced enclosure for animals.The animals kept in such an enclosure.Any of various enclosures, such as a bullpen or playpen, used for a variety of purposes.A repair dock for submarines.To confine in or as if in a pen. See Synonyms at enclose.A female swan.Informal A penitentiary; a prison.