peaks and valleys

:  a pointed or projecting part of a garment

:  the visor of a cap or hat

:  promontory

:  to cause to come to a peak, point, or maximum

:  being at or reaching the maximum

:  of, relating to, or being a period of maximum intensity or activity

:  to grow thin or sickly

:  to dwindle away

:  to set (a gaff, a yard, etc.) nearer the perpendicular

:  to hold (oars) with blades well raised

:  an elongate depression of the earth's surface usually between ranges of hills or mountains

:  an area drained by a river and its tributaries

:  a low point or condition