IPA: /ˈstiːpɪst/
KK: /stipɪst/
Having a very high slope or angle, more than any other in comparison.
The steepest hill in the area is difficult to climb.
Comparative: steeper
Superlative: steepest
Steepest is formed from "steep" (from Old English *stæpe*, meaning high or abrupt) and the suffix "-est" (meaning the most). The word "steepest" refers to the highest degree of steepness or incline.
Think of something that is the 'highest' or most 'abrupt' — 'steep' means high, and '-est' indicates the most. This helps you remember that 'steepest' describes the highest incline.