The Clue Moved on all fours
The Answer CREPT
The word "crept" means to move quietly and slowly, often on hands and knees. This matches the clue "moved on all fours" because when someone creeps, they typically use both their hands and feet. Additionally, "crept" suggests a careful or sneaky movement, which is often how someone would crawl. Overall, it perfectly describes the action of moving on all fours.