If you modify an Indus symbol by adding the dot of emptiness at each of the cardinal points, it signifies that information regarding the central statement is not known. This is the symbol for a
domesticated animal combined with the adjective unknown. Hence, it is the noun stray.
Illustrative Text Reference:
Mohenjo-daro: Seal: M-1673 a: Asko Parpola, B. M. Pande, and Petteri Koskikallio, 2010: Corpus of Indus Seals and Inscriptions: Volume 3,1: Page 10: New material, untraced objects, and
collections outside India and Pakistan: Suomalainen Tiedeakatemia.
Indus Script Sign Number 1036: List of Sign Variants: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.