"Steep" means to incline or rise at a sharp angle, typically used to describe slopes or gradients that are very steep or difficult to climb. Full definition
The app is selling for $ 5.99 right now, kind of steep in the 99 - cent app economy. (treehugger.com)
The world is interconnected as never before but expanding into a foreign market retains its very steep learning curve. (entrepreneur.com)
In general, principals have largely found the slope too steep for race and other discrimination (e.g., disability and age) claims in relation to performance evaluations. (naesp.org)