plumb
/plʌm/
B2 · Upper Int.★★☆☆☆
Simple Meaning
测量某物的深度，或检查某物是否垂直
When to Use
⚙️Technical📚Academic Writing
Upper Intermediate — fluent in familiar topics
Examples in Conversation
“这面墙不垂直——它稍微向左倾斜。”
“他们用特殊工具测量了井的深度。”
Learning Path
▶Full Definition
A little mass of lead, or the like, attached to a line, and used by builders, etc., to indicate a vertical direction.