Based on aesthetics:
* Ugliness: This is the most straightforward opposite, focusing on the physical appearance. However, beauty is more than just looks, so ugliness may not be the only opposite.
* Plainness: This refers to a lack of striking features or attractiveness. It's a milder opposite than ugliness.
Based on internal qualities:
* Evil: Beauty can be associated with goodness, kindness, and compassion. Evil embodies the opposite of these qualities.
* Meanness: This refers to unkindness, cruelty, and lack of compassion.
* Disharmony: Beauty is often associated with harmony and balance. Disharmony represents the opposite of this.
Based on perception:
* Blindness: This can be metaphorical, meaning a lack of appreciation for beauty.
* Indifference: This refers to a lack of emotional response to beauty, not feeling anything positive or negative.
Ultimately, the opposite of beauty depends on your personal interpretation and what you consider to be beautiful.