Frequency: The word is one of the 3000 most common words in English.
1.
You use ~ to emphasize how strong a feeling or quality is, or how large an amount is. (INFORMAL)
I felt a ~ pressure on my chest...
= terrific
ADJ: usu ADJ n emphasis
~ly
The business is ~ly profitable...
ADV: ADV adj/adv/-ed, ADV after v
2.
You can describe someone or something as ~ when you think they are very good or very impressive. (INFORMAL)
I thought it was absolutely ~.
= terrific
ADJ
~ly
I thought they played ~ly well, didn’t you?...
ADV: ADV adj/adv/-ed, ADV after v