Mouth-watering is an adjective that is used to describe food that is appetizing and delicious. It is commonly used to describe dishes and cuisines that are visually appealing and can make people's mouths water. Antonyms for mouth-watering could be: unappetizing, tasteless, unpalatable, stale, unattractive or inedible. Unappetizing means not having a good taste or flavor, tasteless means having little or no taste, unpalatable means not pleasant or satisfying to the taste, stale means no longer fresh or appetizing, unattractive means not visually appealing, and inedible means not suitable for consumption. These words are used to describe food that is not appealing and can turn off a person's appetite.