The antonyms for the word "outlasted" are 'give up', 'quit', 'surrender', 'yield', 'concede', 'relinquish', 'abandon', 'capitulate' and 'cease'. While the term 'outlasted' refers to something that lasts longer than a particular entity, the antonyms mentioned imply the opposite. When one gives up, they choose not to withstand a challenge or a difficult situation. Similarly, when someone surrenders, they accept defeat and stop fighting. Conceding is to acknowledge one's inferiority while relinquishing means letting go of something. On the other hand, quitting and abandoning imply that one has given up hope or interest in something, while ceasing as an antonym indicates that something has stopped existing or operating.