The antonyms for the phrase "settles back" would include words such as "rises up," "jumps forward," "moves ahead," "surges forward," and "spring up." These words suggest movement and action, instead of relaxation and stillness. They imply a sense of urgency, progress, and excitement, rather than contentment, passivity, and comfort. While "settles back" connotes a state of rest or retreat, its antonyms evoke a sense of advancement, ambition, and energy. These words may be used to encourage and motivate people to take risks, pursue their goals, and seize opportunities, rather than linger in their comfort zones.