Think about it like you are referring to “each other” (singular). In that case the word “other’s” is correct. It is like you are saying “each other’s.” With the plural form being others’.

“Other’s” is the correct possessive form of “other,” and we use it when we want to talk about “other” in the singular possessive form being in ownership of an object in the sentence.

Other’s and others’ are both correct forms of the word “other.” Use others when referring to a group of people or things, such as “The others are waiting for you outside.” Use others’ for plural possessive form, such as “The others’ opinions are very important to me.” Other’s acts as the singular possessive form.

Other’s is the correct possessive singular form of the word other. Others is the plural form of the word other. Others’ is the possessive plural of others.

“Anothers” is an incorrect form when attempting to indicate possession; use “another’s” instead. “Anothers'” is a myth and does not exist in English grammar. Understanding proper possessive construction will help avoid these common mistakes. Remember that “another” is always singular, and its possessive form is “another’s.”