Antonyms of adj mouth-watering

1 sense of mouth-watering

Sense 1
mouth-watering, savory, savoury -- (pleasing to the sense of taste)

INDIRECT (VIA appetizing) -> unappetizing, unappetising -- (not appetizing in appearance, aroma, or taste)

Similarity of adj mouth-watering

1 sense of mouth-watering

Sense 1
mouth-watering, savory, savoury -- (pleasing to the sense of taste)
       => appetizing (vs. unappetizing), appetising -- (appealing to or stimulating the appetite especially in appearance or aroma)