vertiginous

Causing vertigo; extremely high or steep; relating to or affected by dizziness.

• vertiginously/vɜːˈtɪdʒɪnəsli/(adv)令人眩晕地
• vertigo/ˈvɜːtɪɡəʊ/(n)眩晕

• vertiginous heights
• vertiginous drop
• vertiginous pace
• vertiginous climb

1. 1.The vertiginous cliff face dropped 500 meters to the sea below. (dizzying, extremely steep)
2. 2.The company's vertiginous growth rate couldn't be sustained indefinitely. (dizzyingly rapid)

• dizzying/ˈdɪziɪŋ/— causing dizziness
• giddy/ˈɡɪdi/— lightheaded
• precipitous/prɪˈsɪpɪtəs/— dangerously steep

from Latin "vertiginosus" — "vertigo" = whirling — "vertere" = to turn — causing a turning sensation