viallisen

Viallisen is a Finnish adjective meaning defective, faulty, or flawed. It is used to describe objects, devices, systems, or processes that have a fault or are not functioning as intended. The word is commonly found in technical, manufacturing, and consumer-protection contexts, as well as in quality-control discussions.

Etymology and grammar: Viallisen is derived from the noun vika, meaning defect or fault, with the suffix -linen to form an adjective. As an attributive adjective, viallinen agrees with the noun it modifies in number and case; its genitive singular form is viallisen (for example, viallisena laitteen? nominative would be viallinen laite). In compound or descriptive phrases, the adjective adapts in standard Finnish declension (for instance, viallinen tuote, viallisessa laitteessa, viallisesta tuotteesta).

Usage: In everyday Finnish, viallinen is most common in formal or technical language. It denotes an inherent defect present in a product, piece of equipment, software, or system. It should not be used to describe people; for people, more appropriate terms would be unrelated to defect or fault. In some contexts, synonyms such as virheellinen (erroneous), vikaantunut (damaged or failing), or puutteellinen (incomplete) may be used depending on nuance.

See also: vika; vikaantua; virheellinen; puutteellinen.