fjóra

Fjóra is a form associated with the Icelandic numeral four. In Icelandic, the number four has several gendered base forms—fjórir for masculine, fjórar for feminine, and fjögur for neuter—and fjóra appears as an inflected variant used in specific grammatical contexts. It is not the standalone counting form used in everyday numbers, but rather a variant that appears in particular constructions noted in some grammars and older texts.

In practical modern usage, the standard counting forms fjórir, fjórar, and fjögur are typically employed when enumerating objects or people. Fjóra, by contrast, tends to occur in more restricted settings, such as certain phrases that require a genitive or dative inflection of the numeral, or in literary, historical, or formal styles. Because of these specialized contexts, alone it is less common in contemporary prose and speech.

The study of fjóra is primarily of interest in Icelandic grammar and historical linguistics, where it helps illustrate how numerals behave across different cases and dialectal or stylistic registers. The form reflects the broader pattern of inflection found in the language's numerals, where counting numbers interact with noun gender, case, and definiteness in ways that can vary between modern standard usage and more archaic or formal written language.

See also: Icelandic language, numbers, fjórir, fjórar, fjögur, grammar and inflection in Icelandic.