puhtaisissa
Puhtaisissa is a Finnish grammatical form meaning “in the clean ones” or “in clean places/things.” It is the inessive plural form of the adjective puhdas, used to describe something that is in a state of cleanliness or purity with reference to more than one item or location. In Finnish, adjectives agree with the nouns they modify in number and case, and the inessive case marks location with the suffix -ssa/-ssä. The plural form is created by combining this inessive ending with the plural, yielding puhtaisissa.
Because puhtaisissa is an inflected form, its exact meaning depends on the noun it accompanies. With an
Etymologically, puhtaisissa is built from the root puhdas (clean) and follows regular Finnish adjective inflection patterns.
See also: Finnish grammar, inessive case, adjective declension, puhdas, puhtaus.