mountain

Compared meaning: a mountain (noun).

比较义项：山（名词）。

• mountain 本词

  The ordinary, everyday noun for this landform; used freely with 'the', 'a', or in the plural, in normal speech and writing about nature, hiking, or weather.

  这是表示这种地貌的日常普通名词，可以自由地与“the”“a”连用，也可用复数，常用于描写自然、爬山、天气等日常话题。

  The mountain was covered in snow all year round.

  这座山终年积雪。

• mount

  Used mainly as a capitalized title placed before a specific peak's name (Mount Everest), or in old-fashioned, poetic writing; almost never stands alone as a plain common noun.

  主要用作放在某座山峰名称前的专有称谓（如Mount Everest），或用于比较老式、诗意的文体中；几乎不会单独作为普通名词使用。

  Explorers have climbed Mount Everest, the highest peak on Earth.

  探险家们登上了珠穆朗玛峰（Mount Everest），地球上最高的山峰。

Both words can mean a mountain. Mountain is the ordinary, everyday noun, used freely with 'the', 'a', or in the plural. Mount is used mainly before a specific peak's name, like 'Mount Everest', or in old-fashioned, poetic writing, rarely alone as a common noun.

这两个词在“山”这个意义上意思相近，但用法差别很大：mountain是日常口语和书面语里最常用、可自由搭配the／a／复数的说法；mount几乎只出现在专有名词前（如Mount Everest），或用于比较正式、古雅的文体中，很少单独作普通名词使用。这里不比较mount作动词时表示“骑上”或“安装”的意思。

Compared meaning: a large amount of something (noun).

比较义项：大量，许多（名词）。

• lot

  The plain, all-purpose word for a large amount; neutral in tone and used constantly in everyday speech with 'a lot of' before any noun.

  最普通、万能的“大量”说法，语气中性，日常口语中极其常用，用“a lot of”加任何名词都可以。

  There is a lot of traffic on this road today.

  今天这条路上交通非常繁忙。

• plenty

  Stresses that the amount is more than enough or fully sufficient, often sounding reassuring; used as 'plenty of' plus a noun, slightly more formal than lot.

  强调数量“足够甚至有余”，语气常带宽心、安慰的意味；用“plenty of”加名词，语气比 lot 略正式。

  There is plenty of food left over from last night's dinner.

  昨晚晚餐剩下了很多食物，绰绰有余。

• mountain 本词

  An informal, exaggerated way to describe an overwhelming amount, usually of something burdensome or abstract like work, debt, or paperwork.

  口语化、夸张的说法，形容数量多到令人吃不消，通常用于工作、债务、文件等繁重或抽象的事物。

  She has a mountain of paperwork to finish before Friday.

  她在周五之前有一大堆文件工作要完成。

Lot, plenty, and mountain all mean a large amount. Lot is the plain, most common, neutral word. Plenty stresses that the amount is enough or more than enough, sounding a little formal. Mountain is an informal, exaggerated word for an overwhelming, often burdensome amount.

这三个词都能表示“大量”，但语气和搭配不同：lot 语气中性，是最常用、最口语化的说法；plenty 强调数量“足够甚至有余”，语气略正式，常带安心、宽裕的意味；mountain 用“堆积如山”的夸张比喻表示数量惊人，多形容繁重或负面的事物，口语色彩很强。这里不比较 lot 的“地块”“命运”等义，也不比较 mountain 的字面“山”义。