Huokoisiin

Huokoisiin is a Finnish grammatical form of the adjective huokoinen, meaning porous. It is used to describe plural nouns in a case that expresses movement into or placement within porous items or structures. In practical terms, huokoisiin appears in phrases such as huokoisiin kappaleisiin or huokoisiin materiaaleihin, where the noun is plural and the context requires an illative-type meaning.

The form is most common in technical and scientific Finnish, especially in fields dealing with porous media, such as materials science, geology, hydrology, and environmental engineering. It helps convey processes like diffusion, absorption, or impregnation that occur within porous substances. As a modifier, huokoisiin agrees with the noun in number and case, so it accompanies other plural illative forms in a sentence.

Morphology and usage notes: huokoisiin is derived from huokoinen and is paired with appropriate plural nouns in sentences that require an illative sense. The corresponding singular illative forms would be huokoiseen (singular) and the base stem huokoinen changes across other cases and numbers according to standard Finnish adjective inflection. In everyday Finnish, huokoisiin mainly appears in formal or technical prose rather than casual speech.

Examples: Neste levisi huokoisiin kappaleisiin. Tutkimus focuses on huokoisiin materiaaleihin kohdistuviin prosesseihin. The term thus functions as a precise descriptor for porous, permeable materials in a contextual, destination-oriented sense.

See also: Finnish grammar, adjectives, illative case, porous materials in science.