1.
You use ~ to indicate that you believe something is obviously true, often when you are trying to convince someone else that it is true.
The judge’s conclusion was ~ wrong...
Plainly, a more objective method of description must be adopted...
ADV: ADV with cl, not last in cl emphasis
2.
You use ~ to indicate that something is easily seen, noticed, or recognized.
He was ~ annoyed...
I could ~ see him turning his head to the right and left...
= clearly
ADV: ADV with v, ADV adj
see also plain