The word 'fish-tail' refers to the action of a car losing control and swerving back and forth, like the movement of a fish's tail. Antonyms for this term could include 'straight-line' or 'controlled,' indicating a smooth and stable driving experience. Other antonyms could be 'predictable' or 'stable,' as fish-tailing implies sudden and unexpected movements. Another potential antonym could be 'professional' or 'experienced,' as novice drivers are more likely to experience fish-tailing due to inexperience and lack of proper driving technique. Ultimately, finding antonyms for 'fish-tail' requires considering words that emphasize safety and stability compared to recklessness and unpredictability.