The word "containerized" refers to something that is organized or packaged in a container. Its antonyms, or opposite meanings, include words such as uncontained, scatterbrained, disorderly, and unorganized. Uncontained refers to something that is not confined or restricted to a container, while scatterbrained implies a lack of focus or direction in organizing objects. Disorderly refers to something that is not arranged in a methodical or systematic manner, while unorganized means lacking structure. In sum, the antonyms for containerized denote chaos, untidiness, and confusion, the opposite of the orderly and efficient traits associated with containerization.