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on the mountainside
on the mountainside 表示“在山腰上”，是说明位置的常用介词短语；mountainside 是可数名词。
They built a cabin on the mountainside.
他们在山腰上建了一间小木屋。
山腹；山腰
mountainsides — plural of mountainside
先理解核心含义，再看它在真实句子里的用法。
山腹；山腰
the side or slope of a mountain
They built a cabin on the mountainside.
他们在山腰上建了一间小木屋。
山坡,山的倾斜侧面。
The sloping side of a mountain.
We stopped halfway up the mountainside to enjoy the view.
我们在山腰处停下来欣赏风景。
The cabin stood on a steep mountainside above the lake.
小屋坐落在湖上方陡峭的山坡上。
A narrow path wound along the mountainside through the pine trees.
一条狭窄的小路沿着山腰蜿蜒穿过松林。
on the mountainside 表示“在山腰上”，是说明位置的常用介词短语；mountainside 是可数名词。
They built a cabin on the mountainside.
他们在山腰上建了一间小木屋。
down the mountainside 表示“沿山腰向下”，常与 roll、slide、fall 等表示移动的动词连用。
The rocks rolled down the mountainside.
岩石从山腰滚落下来。
mountainside 的复数是 mountainsides；复数形式作主语时，谓语动词用复数。
The mountainsides are covered in snow in winter.
冬天，山腰上覆盖着积雪。
Not this
The village is on mountain side.
Use this
The village is on the mountainside.
mountainside 是可数名词，单数形式必须带限定词；“山腰/山坡上”在汉语里可以不说冠词，英语只能说 on the mountainside，不能省略 the。
Not this
The cabin is located in the mountainside.
Use this
The cabin is located on the mountainside.
表示处在山坡/山腰的表面时用介词 on；in the mountainside 会让人理解为在山体内部，所以应改为 on。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
在山坡上
Wildflowers grow all over the mountainside.
野花长满了山坡。
陡峭的山坡
They climbed the steep mountainside to reach the ruins.
他们爬上陡峭的山坡抵达遗址。
梯田山坡
Rice is grown on the terraced mountainside.
水稻种在梯田山坡上。
山坡上的村庄
The mountainside village has no road access in winter.
这个山坡上的村庄冬天没有道路可通。
多岩石的山坡
The trail winds along a rocky mountainside.
小径沿着多岩石的山坡蜿蜒。
他也许会回到山腰，去生活，去存在，去让生命自由奔流。
This line from John Denver's 1972 song 'Rocky Mountain High' has become an American classic, capturing the freedom and beauty of a Colorado mountainside.
这句歌词出自约翰·丹佛1972年的歌曲《Rocky Mountain High》，已成为美国经典，捕捉了科罗拉多山腰的自由与壮美。
Use mountainsides naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 mountain（山）和 side（边）拼在一起：山的侧边就是山腰。想象登山时转头看见的那片斜坡。
语域：neutral 常见场景：geographical description、travel writing、outdoor activities 该词是中性、通用的普通名词，多用于书面或客观描述（如地理、游记），日常口语中也可自然使用，指山的侧面或斜坡。
这些词都以 -side 结尾，发音均为 /saɪd/。mountainside、hillside、seaside、riverside、countryside 的重音都在第一个音节，-side 是弱读的相同结尾，节奏一致。注意 side 是单独的重读词，beside 的重音落在 -side 上，二者与 mountainside 的轻重音模式不同。
Dictionary facts from ECDICT, WIKTIONARY.