Thats exactly how a TM works, like how you trademark a logo, dauntless itself isnt trademarked, but legally the word is TM'ed because it is part of the divergent series of movies and books, and is a major theme/name/item in the book that the author made up, THEREFORE ritosenpai cant just go and call something dauntless without A: consulting their legal team, B: getting permission to use the name from the series which would lead them to have to pay to use the name "dauntless"
also on a secondary note: if you are rich enough? you can trademark anything you want and then everytime somebody used that word or phrase to earn money, youd owe money to the TM