Which word indicates a swift movement in the definition of "hasten"?

The term "hasten" implies to move quickly or accelerate an action or process. In this context, "quickness" directly aligns with the idea of speed and urgency inherent in the meaning of "hasten." It emphasizes a prompt or swift action, contrasting sharply with the other words provided.

In contrast, words like "delay," "slow," and "pausable" suggest a lack of speed or interruptions in movement, which is the opposite of hastening. Therefore, "quickness" accurately captures the essence of hastening, highlighting the urgency and rapidity associated with the term.