detestably is a form of:

Detestable



adjective
1.
(intensely disliked, hateful) ដែលគួរឱ្យស្អប់ខ្ពើម
Example: Cruelty to animals is detestable.
1.
abominable, execrable, foul, hateful, loath-some, odious, revolting, vile
1.
agreeable commendable