Kuituihin

Kuituihin is a Finnish grammatical form, not a separate concept. It is the illative plural form of the noun kuitu, which means fiber. The illative case in Finnish expresses movement toward or into something, so kuituihin translates roughly as into the fibers or toward the fibers (plural). The word kuitu itself refers to a long, slender material made up of fibers and is used in contexts ranging from textiles to biology.

The base noun kuitu covers several related meanings. In textiles and materials science, kuitu refers to natural fibers such as cotton, flax, hemp, wool, or silk, as well as synthetic fibers like polyester or nylon. In biology and medicine, kuitu can describe fibrous strands such as muscle fibers or nerve fibers. Because kuitu is a general term for fiber, the illative plural kuituihin appears in sentences that describe actions, treatments, or studies directed at multiple fibers.

Usage notes emphasize that kuituihin is a case-backed form used with verbs that indicate direction, introduction, or focus on fibers. It is common in technical, scientific, or instructional language to discuss processes or properties that involve the fibers themselves, for example in textile finishing, fiber reinforcement, or fiber-related biology. The form also appears in compound phrases referring to specific fiber groups, such as sähkökuituihin (into electrical fibers) or kuituihin liittyvät tutkimukset (fiber-related studies).

See also kuitu; kuitujen; kuitujen käsittely.