The word Steply is misspelled against Steeply, meaning "rising or falling sharply"
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Steeply has double "ee" is mispronounced as "e"
Remember double 'EE' in between the strings St & ply which should not be misspelled with single 'E'
Wrong Spelling:  St-e-ply 
Correct Spelling:  St-ee-ply 
Explore spell check of Steeply to spell without errors.