The term "pegged down" implies establishing something firmly or locking it down. However, its antonyms would be quite the opposite. Words like loosen, unfasten, unlock, detach, and release suggest the removal of whatever is being held in place. Other antonyms could be dismantle, unfetter, liberate, disentangle, and disassemble. These words connote the idea of freedom, flexibility, and mobility. Therefore, the usage of these antonyms may imply liberation from a restrictive situation, enabling a release from confinement or rigid routines. By employing these antonyms and its associated meanings, it highlights the broad spectrum of language and its endless possibilities of expression.