There are several antonyms for the word "movably." These include fixedly, immovably, rigidly, stationary, and solidly. Fixedly suggests something that is firmly attached or secured in place and cannot be moved easily. Immovably implies something that cannot be moved or changed, such as a solid rock or a cemented structure. Rigidly suggests something that is inflexible and unable to bend or move easily. Stationary implies something that is not moving at all, such as a parked car or a person standing still. Finally, solidly suggests something that is firm and stable, without any wobble or shaky movements.