ääriviivasta
Ääriviivasta, also known as the "Finnish comma," is a diacritical mark used in the Finnish language to indicate a pause or a break in speech. It is represented by a small vertical line placed above a letter, typically the letter 'a' or 'o'. The ääriviivasta is used to distinguish between different meanings of words that would otherwise be spelled the same, such as "saa" (weather) and "sää" (rule or regulation).
The ääriviivasta is a unique feature of the Finnish orthography and is not found in other languages.
The ääriviivasta is a relatively recent addition to the Finnish alphabet, having been introduced in the 19th