The phrase "more highspeed" refers to a faster speed than what is already considered fast. However, its antonyms refer to slower speeds or reduced velocity. The antonyms for "more highspeed" include: slow, sluggish, unhurried, idle, stagnant, inactive, decelerated, sluggish, lethargic, and lazy. These words are often used to describe the opposite of fast-moving objects or activities. For instance, a car moving at a slow speed is considered sluggish, while a person who is not active is described as lazy. The use of antonyms is essential in language to create a balance and ensure clarity in communication.