Teräksiseen

Teräksiseen is the illative singular form of the Finnish adjective teräksinen, which means “made of steel” or “steel-.” In Finnish, adjectives agree with the nouns they modify in number and case, and the illative case expresses movement into or a state related to what the noun denotes. For adjectives of the -inen type, the illative singular commonly takes the ending -iseen, yielding teräksiseen when describing a noun in illative.

Etymology and morphology: The base noun teräs means steel, and the suffix -inen forms adjectives meaning “made of” or “having the quality of.” The illative form teräksiseen is the result of combining the -inen adjective with the illative ending -een/-iseen, following Finnish declension patterns for adjectives. This form is used when the entire noun phrase is in the illative case, as in “into a steel ...” constructions.

Usage: Teräksiseen is typically found in descriptive or technical language to specify material or quality, especially in contexts involving movement into a space or object made of steel, or in metaphorical statements describing a state related to steel. Common collocations include teräksiseen muottiin (into a steel mold) and teräksiseen laatikkoon (into a steel box). It is one of several inflected forms of teräksinen that tailor the adjective to various grammatical roles.

Examples: A phrase such as teräksiseen muottiin means “into a steel mold,” with teräksiseen signaling both the material and the illative case of the associated noun muotti. The form appears alongside other illative adjectives such as teräksiseen, teräksiseen, or teräksisiin depending on number and noun.

See also: teräksinen, Finnish adjective declension, illative case.