Its

The word used to show that something belongs to or is a part of a thing, animal, or idea already mentioned. It is the possessive form of “it.”

Formed in English by adding the possessive “-s” to “it,” similar to “his” or “hers.” Earlier English used “his” for neuter possession (as in “the sunne hath lost his light”) before “its” became standard in the 1600s. The lack of an apostrophe follows the pattern of other possessive pronouns like “his” and “hers.”