Belonging to or associated with a thing previously mentioned or easily identified
Examples:
Soon we were winding in and out of its recesses.A mountain usually doesn't change its position.The sun, declining through its shallow arch, dropped behind the tree-tops.
Synonyms:
This word has no synonyms
Antonyms:
This word has no antonyms
Their
/ðer/
Belonging to or associated with the people or things previously mentioned or easily identified
Examples:
Their cat is fat.He awoke refreshed, and they continued their journey.I shall never forget the kind way their hands explored me.
Synonyms:
Antonyms:
This word has no antonyms
Ways to tell them apart:
Its is a possessive form of it, think of it as owning something, like the dog wags its tail.
Their refers to something that belongs to them, typically more than one person, like they took their books.
Both its and their are used to show possession, but its is for singular and neutral nouns, whereas their is for plural ones.
Remember, its never has an apostrophe, unlike its (which means it is').
Their can be replaced with his or her to see if it fits contextually for ownership among people.