viðbættri

viðbættri is the dative feminine singular form of the Icelandic adjective viðbættur. The adjective means "added" or "additional." It is derived from the verb bæta, meaning "to improve," "to add," or "to mend." When used in its base form, viðbættur, it is masculine nominative singular. The feminine nominative singular form is viðbætt. The neuter forms are viðbætt (nominative/accusative singular) and viðbætt (nominative/accusative plural). The dative plural form is viðbættum. The genitive forms are viðbætts (masculine/neuter singular) and viðbættrar (feminine singular), and viðbættra (plural).

The word viðbættri functions grammatically as an adjective modifying a feminine noun in the dative case. For example, in a sentence like "Hún fékk viðbættri þjónustu" (She received additional service), the noun "þjónustu" (service) is feminine and in the dative case, hence the adjective takes the "viðbættri" form. Understanding the declension of Icelandic adjectives is crucial for correct usage, as they change form based on gender, number, and case of the noun they describe.