Tremor tendinum, a medical term that refers to a specific type of involuntary tremor characterizes by twitching, quivering or shaking of tendons, can have several antonyms based on the context. Opposite words that come to mind include steadiness, stability, firmness, and solidity. When it comes to human physiology, tremor tendinum is often associated with the lack of control in muscular movement. Antonyms to this would include precision, accuracy, exactness, and control.
In a broader sense, tremor tendinum can also be linked with worry, anxiety, and nervousness. Antonyms to these feelings would be calmness, serenity, relaxation, and tranquility. Additionally, in seismic terms, tremors are movements of the earth's crust, which can have destructive consequences.