This ideograph combines the outline of an area with the verb to rise. The verb to rise in Indus script is equivalent to the Chinese character shān 彡. A raised area gives us the noun hill
or mound. Mahadevan's sign number 1084 can also be an ideograph for a stack or pile of objects.
Illustrative Text Reference:
Mohenjo-daro: Seal: M-798 a: Sayid Ghulam Mustafa Shah and Asko Parpola, 1991: Corpus of Indus Seals and Inscriptions: Volume 2: Page 68: Collections in Pakistan: Suomalainen Tiedeakatemia.
Indus Script Sign Number 1084: List of Sign Variants: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.