Steepen
Pronunciation : Steep"en
Part of Speech : v.
Definition : Defn: To become steep or steeper. As the way steepened . . . I could detect in the hollow of the hill some traces of the old path. H. Miller.
i. [imp. & p. p. Steepened; p. pr. & vb. n. Steepening.]
Source : Webster's Unabridged Dictionary, 1913