layer
In French, the word 'couche' is used to refer to a layer. This can be used in various contexts such as geology, where it refers to a stratum of rock or soil, or in computer science, where it refers to a level of abstraction in a software system. It can also be used in everyday language to refer to a layer of clothing or a layer of paint.
The baby's diaper is dirty.
In this phrase, 'couche' is used to refer to a baby's diaper. It's quite a common usage especially in a familial context. This is a neutral, declarative sentence stating a fact about the condition of the baby's diaper.
The layers of paint are still wet.
This sentence uses 'couche' to signify 'layer', a common usage particularly in the context of painting or surfaces. In this case, it mentions about the condition of the layers of paint applied to a particular surface or canvas.
He lives in a high social layer.
In this phrase, 'couche' means 'layer' and is used in a social context to refer to the levels within a society. This is an example of applying 'couche' in a figurative or non-literal context, more specifically about social strata.