downhill

US /ˌdaʊnˈhɪl/
UK /ˌdaʊnˈhɪl/
1.

下り坂

a downward slope.

:
on downhills brake gently
2.

下り坂

a downhill race.

1.

下り坂

leading down toward the bottom of a slope.

:
the route is downhill for part of the way
1.

下り坂

toward the bottom of a slope.

:
he ran downhill