vaahtoissa
Vaahtoissa is a Finnish word that represents the locative plural form of the noun vaahto, meaning foam or froth. In grammatical terms, -issa/-issä marks the inessive case, used to indicate location “in” or “inside.” The plural form vaahtoissa is used when referring to multiple foams or to a foam region in a broader, often descriptive, sense rather than a single foam layer.
In practice, vaahtoissa appears in descriptive writing across everyday and technical contexts. It is common in
- Kahvin vaahtoissa on pieniä kuplia. (There are small bubbles in the foam of the coffee.)
- Meren vaahtoissa näkyy ajoneuvojen jälkiä. (In the foam of the sea spray, you can see tracks from
Etymology and related forms: Vaahtoissa is derived from the noun vaahto, with the locative suffix -issa/-issä.