- bluff, bold, sheer - very steep; having a prominent and almost vertical front; "a bluff headland"; "where the bold chalk cliffs of England rise"; "a sheer descent of rock"
Antonym: gradual (indirect, via steep)
- bluff - bluntly direct and outspoken but good-natured; "a bluff but pleasant manner"; "a bluff and rugged natural leader"
Antonym: indirect (indirect, via direct)