From Wiktionary, the free dictionary
Representing a white ostrich feather. The phonogrammatic value of šw is derived by the rebus principle from the glyph’s use as the logogram for šwt ( “ feather ” ) .
šw )Biliteral phonogram for šw , as in šw ( “ Shu ” ) .Logogram for šwt ( “ feather ” ) .Logogram for mꜣꜥt ( “ Maat ” ) .Determinative in mꜣꜥt ( “ Maat ” ) as a substitute for (𓁦 Gardiner, Alan (1957 ) Egyptian Grammar: Being an Introduction to the Study of Hieroglyphs , third edition, Oxford: Griffith Institute, →ISBN page 474 Henry George Fischer (1988 ) Ancient Egyptian Calligraphy: A Beginner’s Guide to Writing Hieroglyphs , New York: Metropolitan Museum of Art, →ISBN Betrò, Maria Carmela (1995 ) Geroglifici: 580 Segni per Capire l'Antico Egitto , Milan: Arnoldo Mondadori Editore S.p.A., →ISBN 
