From Wiktionary, the free dictionary
cartouche of Darius II , with the final -š of the name visible
Representing a pool with lotus flowers. The phonogrammatic value derives by the rebus principle from the glyph’s use as a logogram for šꜣ ( “ field, countryside, swamp ” ) .
(šꜣ )
Biliteral phonogram for šꜣ .
Group-writing phonogram for š ; compare uniliteral 𓈙 (Gardiner number: N37).
Logogram for šꜣ ( “ field, countryside, swamp ” ) .
Logogram for ꜣḫt ( “ Akhet , inundation season” ) .
Hieratic
Demotic
Coptic
Ϣ
Gardiner, Alan (1957 ) Egyptian Grammar: Being an Introduction to the Study of Hieroglyphs , third edition, Oxford: Griffith Institute, →ISBN , page 480
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