坂 slope

土 (earth) + 反 (anti) Same-ON
★★★☆☆
7 strokes

Onyomi

HAN

Mnemonic

HAN solo, accustomed to the zero-gravity of space, is against climbing the steep slopes of the earth!

Kunyomi

さか a slope of a hill (BOOBOO: not the hill itself. Hills are the similar-sounding おか!)
★★★☆☆

Jukugo

下り坂(くだりざか)

go downhill ★★★☆☆
下 (below) + 坂 (slope) = 下り坂 (go downhill )

A noun meaning, "the act of going downhill." Unhelpfully, this is not used as a verb. What the hell, man?

上り坂(のぼりざか)

go uphill ★★★☆☆
上 (above) + 坂 (slope) = 上り坂 (go uphill )

"the act of going uphill." Same deal.

Lookalikes

Meaning Hint Radical
板 plank WOOD 木
仮 provisional PERSON 人
坂 slope EARTH 土

The board is made of WOOD
The PERSON is provisionally good (before xmas).

The EARTH has slopes called hills.