sky-high
/ˈskaɪˈhaɪ/adverb & adjective
1- as if reaching the sky; very high天一般高地（的）; 极高地（的）：
as adv. they saved a president from being blown sky-high.他们保住总统不被吹得天一般高。
1.1
- at or to a very high level; very great高水平地（的）; 非常大地（的）：
as adj. sky-high premiums.高额保险费。