"steepest" in the adjective sense
1. steep
having a sharp inclination
"the steep attic stairs"
"steep cliffs"
2. exorbitant, extortionate, outrageous, steep, unconscionable, usurious
greatly exceeding bounds of reason or moderation
"exorbitant rent"
"extortionate prices"
"spends an outrageous amount on entertainment"
"usurious interest rate"
"unconscionable spending"
3. steep
of a slope set at a high angle
"note the steep incline"
"a steep roof sheds snow"
Source: WordNet® (An amazing lexical database of English)
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