Huokoisilla

Huokoisilla is a Finnish adjective form meaning porous. It is the plural adessive form of huokoisa and is used to describe plural nouns in the adessive case (on/with porous materials, surfaces, etc.). The corresponding noun is huokoisuus, meaning porosity.

Usage is common in scientific and technical Finnish, especially in materials science, geology, filtration and environmental engineering. It describes substances whose internal structure contains voids or pores that allow the passage of fluids or gases. In texts about porous materials, huokoisilla modifies plural nouns such as materiaaleilla or pinnoilla, indicating properties of multiple items.

Grammar: Finnish adjectives agree with the noun in number and case. The adessive plural ending -illa/-illä marks the form used with plural nouns. Thus huokoisilla materiaaleilla means “with porous materials,” and huokoisilla pinnoilla means “on porous surfaces.” A typical example sentence is: Suodatuksessa käytetään huokoisilla materiaaleilla varustettuja suodatinlevyjä.

Etymology and related terms: huokoisa is the base adjective meaning porous, and huokoisuus denotes porosity. Related forms include huokoinen (porous) and compounds describing specific porous characteristics or applications. The term is used across disciplines to contrast porous versus non-porous materials and to discuss how porosity influences performance such as permeability, filtration efficiency, and moisture management.

See also: huokoisuus, huokoisa, porosity, permeability.