soinnillisiin

Soinnillisiin is a Finnish linguistic term formed as the plural illative form of the adjective soinnillinen, meaning voiced or sonorous. In phonology and phonetics, soinnillinen is used to describe sounds produced with vocal cord vibration, such as many voiced consonants and vowels. The illative plural form soinnillisiin appears when the adjective modifies a plural noun in the illative case, for example soinnillisiin äänteisiin, meaning into or toward the voiced sounds.

Morphology and usage are typical of Finnish grammar. Adjectives agree with the noun they modify in number and case, so soinnillinen becomes soinnillisiin when describing a plural noun in the illative. This construction is common in academic or descriptive texts on sound systems, where the class of sounds is being specified or contrasted with other classes, such as soinnittömät äänteet (voiceless sounds). The term itself does not denote a standalone concept; rather, it indicates a grammatical form used to refer to a group of sounds defined by voicing.

In practical use, soinnillisiin is most likely to appear in sentences that discuss phonetic features or sound inventories. For example: Soinnillisiin äänteisiin kuuluvat äänteet ovat artikulatorisesti vibrationsa aiheuttavia. A more typical example in Finnish would be: Soinnillisiin äänteisiin kuuluvat muun muassa /b/, /d/ ja /g/. The form helps locate discussion to a specific subset of sounds within a broader analysis of phonetic categories.