downhill

Etymology

down- + hill

adv

1. Down a slope.
   Because we got to the summit of the mountain, we could only go downhill from there.
   I worked my way downhill, slip sliding in the mud along a steep embankment that followed a stream until it emptied into a creek. 2006, Michael Pollan, The Omnivore's Dilemma, The Penguin Press, page 388
2. (by extension) Deteriorating, getting worse.
   After Don made those tasteless remarks, our relationship with him went downhill.

adj

1. Located down a slope or hill.
2. Going down a slope or a hill.
3. (by extension) Easy.

noun

1. (uncountable) The fastest of the disciplines of alpine skiing.
2. (countable) A rapid descent of a hill in related sports, especially in alpine skiing.

verb

1. To take part in downhill skiing.