The Indus Dictionary Project
This sign is formed from the the verb to join with the addition of a pair of arms. It shares a common root with the Chinese character jiāo 交. The modern Chinese character is a verb with several different translations, including: to meet; to make friends; to encounter; and, to deliver. In Indus script, Mahadevan's sign number 59 is used for the verb to deliver, or the noun delivery.
Harappa: Seal: H-98 a: Jagat Pati Joshi and Asko Parpola, 1987: Corpus of Indus Seals and Inscriptions: Volume 1: Page 190: Collections in India: Suomalainen Tiedeakatemia.
In inscription H-98, Mahadevan's sign number 59 appears in the noun delivery man.
Indus Script Sign Number 59: Sign List of the Indus Script: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.