The antonyms for the word "more fallen-in" are "less deteriorated," "more stable," or "less dilapidated." These words signify a state of stability and strength compared to the weakened state of something that has fallen in. For instance, a building that has undergone repairs is less deteriorated, and thus, more stable than a previously fallen-in or dilapidated building. The word choices used in writing or speaking can create a significant impact, and by selecting these antonyms of "more fallen-in," we can symbolize positive qualities such as stability, strength, and resilience.