What's the adjective for steepened? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs steep and steepen which may be used as adjectives within certain contexts.
“If we were to climb the steep slope of the Andes from the Pacific shores and cross the summit by one of the passes, we should find ourselves on the high tablelands.”
“Areca growers have been hit hard by the steep crash in prices.”
“The greater telecommunications industry relies increasingly on optical technology to meet steep demands for greater services at lower costs.”