The antonyms for "fill to overflowing" can include words like empty, drain, deplete, exhaust, or evacuate. These antonyms represent the opposite of filling something to capacity or beyond, and instead suggest removing or reducing the amount of substance or content within a space or container. Emptiness, depletion, and evacuation, in particular, imply a lack or removal of presence, while draining and exhausting suggest a gradual or forced removal of resources or energy. Using these antonyms allows for greater clarity and specificity in communication, and may be particularly useful in contrasting situations where filling or overflowing is a problem or unwanted outcome.