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Glite Dictionary
soap film

soap film

3.2
A thin clear layer of soap left on a surface after washing
  • noun
translation icon : capa de jabón
  • After washing the dishes, I noticed a thin soap film on the plates that needed rinsing.

Examples

  • A colorful soap film shimmered on the surface of the water, reflecting the sunlight.

  • So this is actually the soap film, all right?

  • You should clean the shower regularly to prevent soap film from forming on the tiles.

Synonyms

film
vssoap film
191 3.2

A thin layer that covers a surface to protect it

forms from a cleaning solution after washing and appears as shimmering transparent residue

How Soapy

suds
1.8
soapiness
2.8
soap film
3.2

Surface Forms

soap film singular
soap films plural

Morphology

soap + film

The meaning 'a thin layer of soap solution...' is directly and compositionally built from 'soap' (the washing substance) + 'film' (a thin sheet or layer); 'soap' simply specifies the kind of film. This follows regular English noun–noun compounding and is cross-linguistically common, so a B1 learner who knows both constituents would readily infer the MWE meaning.

Etymology

The term soap film comes from the simple image of a thin 'skin' of soap that stretches like a clear film across a surface or a bubble and shines with colors, so it means 'a thin layer of soap solution' left after washing.