If you say that something such as behaviour or a situation is ~, you disapprove of it strongly, and feel that the person or people responsible should be ashamed of it.
It’s ~ that they have detained him for so long...
= shocking, scandalous
ADJ: oft it v-link ADJ that disapproval
~ly
He felt that his brother had behaved ~ly.
ADV: ADV after v, ADV adj/-ed