ply
As a noun, this term describes a specific layer of material. It is frequently used in technical specifications for plywood or yarn to indicate strength and thickness. Because it refers to a discrete layer, it is a countable noun. As a verb, the word carries a sense of repetition and persistence. Whether it refers to a professional trade, the serving of refreshments, or the navigation of a shipping route, the common thread is the steady, habitual application of effort or resources over time.
Meanings
To work steadily and diligently at a particular trade or craft.
"He continued to ply his trade as a carpenter for forty years."
To provide someone with a continuous supply of food or drink, often to persuade them or make them feel welcome.
"The hosts plied their guests with champagne and appetizers all evening."