俯角 （フカク） depression, angle of dip

俯瞰 （フカン） overlooking, looking down at, having an overhead view, having a bird's-eye view, having a high-angle view

俯す （ふす） to lower (one's head, gaze, etc.)

俯く （うつむく） to hang one's head, to look down, to cast one's eyes downward