Doublequick is an adjective that describes something that is done or happening very quickly, with great speed or haste. It is often used in phrases like "doublequick time" or "march in doublequick time" to indicate urgency or a need for speed. The antonyms for doublequick would be words like slow, sluggish, leisurely, or unhurried. These opposites imply a more relaxed or laid-back pace, rather than a frenetic rush. Other antonyms could include moderate, measured, or steady, which describe a pace that is neither too fast nor too slow. Regardless of the situation, there is always a counterpart to doublequick that can convey a different sense of tempo and urgency.