His genitive

His genitive is a fancy way of saying "belonging to him". When we use the word "his" to show possession, like "his toy" or "his house", we're using his genitive case. It's a way of changing the form of a noun to show that it belongs to someone. In English, we usually just add an apostrophe and an "s" to a noun to show possession, but in some other languages, like Latin or Russian, they have different endings for different cases. It's a way of making sure we understand who owns or has something, like when we want to say "This is his ice cream cone" or "That is her bike". Basically, his genitive is just a fancy way of showing who something belongs to.