The term 'stepped lively' can be summarized as TROTTED, which is a 7-letter word. Trotting is a type of gait used by horses and other four-legged animals in which the legs move in diagonal pairs, with the left hind leg and right front leg moving together, followed by the right hind leg and left front leg. It is a faster gait than walking, but slower than galloping. Trotting is often used for long-distance travel, and is also used in horse racing.