plumb

Compared meaning: standing straight up, at a right angle (adjective).

比较义项：垂直的，直立的（形容词）。

• vertical

  The general, everyday word for anything standing straight up at a right angle to the ground; used broadly for walls, lines, cliffs, takeoffs, and technical diagrams alike.

  泛指与地面成直角、笔直竖立的通用词，日常和技术语境都常用，可形容墙壁、线条、峭壁、起飞方式或技术图表等。

  The ladder leaned against a tall, vertical wall of the old barn.

  那把梯子靠在旧谷仓一面高高的垂直墙上。

• plumb 本词

  A more formal, technical word stressing exact, precise verticality, often checked or achieved with a tool like a plumb line; common in building and construction contexts.

  语气更正式、更专业，强调「精确的」垂直，常借助铅垂线等工具来检验或确定，多用于建筑、装修等场合。

  He used a plumb line to check if the wall was straight.

  他用一条铅垂线来检查墙是否垂直。

Vertical and plumb both mean standing straight up at a right angle. Vertical is the everyday, general word, used for walls, lines, or cliffs. Plumb is more technical and formal, stressing exact verticality, mainly in building work. Other senses of plumb are not compared.

两词都表示与地面成直角、笔直竖立，但语气和使用场合不同：vertical 是日常和科技语境中最常用的通用词，plumb 则强调「精确垂直」，多见于建筑、装修等专业场合，常与 plumb line（铅垂线）连用。plumb 另有「（形容词性副词）完全地，恰好」以及作动词「安装管道」「测深」等其他意思，这里不作比较。