Based on function:
* Smooth skin: Whiskers help animals sense their surroundings, so smooth skin lacking any sensory hairs could be considered the opposite.
* Blindness: Whiskers provide tactile information, so blindness could be considered an opposite in terms of sensory input.
Based on appearance:
* Short, fine hair: Whiskers are usually long and stiff, so short, fine hair might be considered the opposite visually.
* No facial hair: While whiskers are technically hair, they are distinct and often longer than the rest of the facial hair. So, no facial hair at all could be considered an opposite in terms of appearance.
Based on context:
* Mustache: If you're talking about a cat's whiskers, then a mustache on a human might be a playful opposite.
Ultimately, the "opposite" of whiskers depends on your specific meaning and context.