The word itself, changed to Zamin in Modern Persian, is cognate to the Baltic Zemes, Slavic Zem, Serbian Zemlja, Greco-Thracian Semele, meaning the planet Earth, as well as soil.
The element zam is the domain of the Armaiti, the Amesha Spenta of the earth and one of the Ahura Mazda's primordial 'divine sparks' from whom all other creation originates.
"[4] The principal source of information on the Zoroastrian notions of the earth (and accordingly of its divinity) is the Bundahishn, an account of the religion's cosmogony and cosmology completed in about the 12th century.
Then, from its surface grew up the mountains, the tallest of these being Hara Berezaiti whose outlying ranges encircled the earth and beyond which lay the world river Aredvi Sura.
The fifth creation is that of the primordial bovine Gavaevodata from whose seed, marrow, organs and soul the earth is populated with animal life and the progenitors of the human race.
[6] In the Counsels of Adarbad Mahraspandan the author advises his readership not to take medicine on the day of the month dedicated to Zam.
[7] In the Pazend Afrin-i haft Amshespand ("Blessings of the seven Amesha Spenta"), Zam is joined by Amardad, Rashn and Ashtad (Ameretat, Rashnu and Arshtat) in withstanding the demons of hunger and thirst.