Viivistä
Viivistä is a Finnish inflected form that is not part of standard Finnish usage for the plural elative of viiva (line). In contemporary Finnish, the correct elative plural is viivoista (from the lines). Viivistä may appear as a nonstandard variant in dialects, older texts, or as a common orthographic error when writers confuse the elative suffixes stemming from viiva.
In standard Finnish grammar, viiva is a masculine noun with plural forms such as viivat (nominative plural)
When discussing lines in maps, graphs, typography, or design, speakers and writers should use viivoista for
See also: viiva, viivat, viivoista, Finnish grammar, elative case.