This is the 14574th most frequent Russian word.
пенка
"Пенка" means "foam" or "film" (e.g., on a liquid).
In this sentence, 'пенка' (foam) refers to the thin layer of froth that is often observed on the surface of coffee or other liquids.
На поверхности кофе появилась пенка.
A foam appeared on the surface of the coffee.
Here, 'пенка' (foam) denotes the shaving foam product used, illustrating its practical application.
Я смазал царапину пенкой для бритья.
I applied shaving foam to the scratch.
In this example, 'пенка' (foam) describes the bubbles or lather formed from soap in water, highlighting its playful aspect.