arviolla
Arviolla is a Finnish linguistic term referring to the adessive form of the noun arvio, meaning "on the basis of an estimate" or "by estimate." In usage, arviolla appears in formal or technical writing to indicate that a claim, figure, or judgment is based on an estimate rather than exact data. It is formed from arvio (estimate) plus the adessive suffix -lla, which marks a surface or basis.
The phrase is commonly found in contexts such as government reports, business analyses, and statistical summaries,
Related terms include arvio (estimate) and arviolta (approximately), the latter being the standard adverb for approximate