Here are some characteristics that might make someone detestable:
* Cruelty: They inflict pain or suffering on others intentionally.
* Dishonesty: They are deceitful, manipulative, and untrustworthy.
* Selfishness: They prioritize their own needs and desires above all else, even at the expense of others.
* Hypocrisy: They profess beliefs or values that they don't actually uphold.
* Arrogance: They have an inflated sense of self-importance and look down on others.
* Lack of empathy: They are unable or unwilling to understand or share the feelings of others.
It's important to note that "detestable" is a strong word and should be used sparingly. It's also subjective, meaning different people may find different qualities detestable.
Remember, it's always best to focus on understanding and respecting others, even when we disagree with them.