his /(h)ɪz, ˌhɪz/
1. Belonging or pertaining to him; -- used as a pronominal adjective or adjective pronoun; as, tell John his papers are ready; formerly used also for its, but this use is now obsolete.
No comfortable star did lend his light. --Shak.
Who can impress the forest, bid the tree
Unfix his earth-bound root? --Shak.
Note: ☞ Also formerly used in connection with a noun simply as a sign of the possessive. “The king his son.” --Shak. “By young Telemachus his blooming years.” --Pope. This his is probably a corruption of the old possessive ending -is or -es, which, being written as a separate word, was at length confounded with the pronoun his.
2. The possessive of he; as, the book is his. “The sea is his, and he made it.”