Over-strain refers to the excess pressure or effort put on something or someone beyond their capacity. The antonyms to over-strain are the words that connote rest, relaxation, leisure, and ease. A few antonyms of over-strain are tranquility, calmness, relaxation, rest, and recuperation. These words signify a state of peacefulness and calmness, where there is no exertion or tension. Other antonyms of over-strain include effervescence, buoyancy, liveliness, and high spirits, which indicate cheerfulness and enthusiasm. It is important to understand the antonyms of over-strain and incorporate them into our daily lives to maintain balance and well-being.