The antonyms for "pre-tensionless" are words that indicate effort, anticipation, and readiness. Some of the antonyms for this term include "prepared," "expectant," "anxious," "ready," "tense," "strained," and "stressed." These words show that individuals are getting ready for an event or making an effort to ensure that everything goes smoothly. When a person is "prepared," they have done everything necessary to ensure their success in a particular task. "Expectant" means that individuals are waiting for something to happen and are anticipating it with enthusiasm. "Anxious" refers to an individual experiencing unease or worry about an event.