þríhyrningnum

þríhyrningnum is an Icelandic word that translates to "the triangle" in English. It is the definite accusative singular form of the word þríhyra, meaning triangle. In Icelandic grammar, nouns change their endings based on their case, number, and gender. The accusative case is typically used for the direct object of a verb. Therefore, "þríhyrningnum" would appear in a sentence where a triangle is the direct recipient of an action. For example, "Ég teiknaði þríhyrningnum" could translate to "I drew the triangle." The word itself is derived from "þrír," meaning three, and "horn," meaning corner or angle, directly reflecting the geometric definition of a triangle. While "þríhyra" is the general term for a triangle, "þríhyrningnum" specifically denotes "the triangle" as a particular instance within a sentence's grammatical structure. Understanding such inflections is crucial for comprehending and constructing grammatically correct Icelandic sentences.