The word "collapsed" means to fall down suddenly or to break down completely. Here are some antonyms and an analysis:
stand/stay upright: When something stands or stays upright, it is the opposite of collapsed. For example, "The building remained standing even after the earthquake, in contrast to those that had collapsed." Standing implies stability and strength, showing that an object is able to resist forces that would cause it to fall or break down.
be sturdy/robust: These words suggest that something is strong and able to withstand pressure or stress. For instance, "The bridge was sturdy and showed no signs of collapsing, unlike the old one that had given way." Sturdiness and robustness indicate durability and the ability to maintain an upright position.
remain intact: This means to stay in one piece and not break apart or collapse. For example, "The vase remained intact even when dropped, unlike others that had collapsed into pieces." Remaining intact emphasizes the preservation of an object's structure and integrity.
be stable/solid: Stability and solidity are antonyms for collapsed as they imply a lack of movement or breakdown. For instance, "The table was stable and did not collapse under the weight of the books." These words suggest that an object is firmly in place and not likely to give way.
endure/persist: While not direct opposites, these words can imply that something is able to withstand conditions that might cause collapse. For example, "The business endured through tough times and did not collapse like some of its competitors." Enduring and persisting suggest a resilience and ability to continue in the face of challenges.