1.
If you describe something as ~, you are emphasizing that it is very harmful or damaging.
Affairs do have a ~ effect on marriages.
ADJ: usu ADJ n emphasis
2.
You can use ~ to emphasize that something is very shocking, upsetting, or terrible.
The diagnosis was ~. She had cancer.
ADJ emphasis
3.
You can use ~ to emphasize that something or someone is very impressive.
...a ~ display of galloping and jumping...
ADJ emphasis
~ly
Its advertising is ~ly successful...
ADV: usu ADV adj/-ed