bluff 2 
(blŭf)
(blŭf)n.
A steep headland, promontory, riverbank, or cliff.
adj. bluff·er, bluff·est
1. Having or showing a rough and blunt but not unkind manner: "the great big bluff guests who told bawdy jokes and got up early to watch the sun rise" (Erin McGraw).
2. Having a broad, steep front: the boat's bluff bow.
[Probably from obsolete Dutch blaf or Middle Low German blaff, broad.]
bluffly adv.
bluffness n.