The word is used to refer to the actions, reactions, and patterns of conduct exhibited by a group of people, animals, or other entities. For example, one might discuss the "käyttäytymistensä" of a particular social group, the "käyttäytymistensä" of a herd of animals, or even the "käyttäytymistensä" of a particular software program.
In linguistics, "käyttäytymistensä" is an example of agglutination, where grammatical functions are expressed by adding suffixes to a root word. The root "käyttäyty-" relates to behaving or acting, and the suffixes "-minen" nominalize the verb, forming the noun "käyttäytyminen." The possessive suffix "-nsä" then attaches to this noun to indicate ownership by a plural subject.