Representing a pair of forward-facing walking legs. From the Old Kingdom (Dynasties 3–6) onward this glyph would sometimes include a kilt. This glyph was conventionally colored red. Sometimes the space between the legs was painted white.
Gardiner, Alan (1957) Egyptian Grammar: Being an Introduction to the Study of Hieroglyphs, third edition, Oxford: Griffith Institute, →ISBN, page 457
Henry George Fischer (1988) Ancient Egyptian Calligraphy: A Beginner’s Guide to Writing Hieroglyphs, New York: Metropolitan Museum of Art, →ISBN, page 19