The Icelandic language has several unique features that set it apart from other Nordic languages. Here are some of them:

1. Conservatism: Icelandic is known for its linguistic conservatism. It has preserved many features of Old Norse, the language spoken by the Vikings. This makes Icelandic more similar to Old Norse than any other living Scandinavian language.

2. Pronunciation: Icelandic has a complex phonological system with several unique sounds. One notable feature is the presence of voiceless dental fricatives (represented by the letters "þ" and "ð") which are not found in other Scandinavian languages. These sounds are often challenging for non-native speakers.

3. Vocabulary: Icelandic has a rich vocabulary that includes many words of Old Norse origin. This contributes to its distinctiveness and sets it apart from other Scandinavian languages, which have undergone more significant lexical changes over time.

4. Grammatical complexity: Icelandic has a highly inflected grammar, with four noun cases (nominative, accusative, dative, and genitive) and three grammatical genders (masculine, feminine, and neuter). It also maintains a strong system of verb conjugations, including four different conjugation classes.

5. Word formation: Icelandic has a productive system of word formation, allowing for the creation of new words by combining roots and affixes. This flexibility enables Icelanders to coin new words and adapt foreign terms into the language while maintaining its structure and integrity.

6. Pure language policy: Iceland has a strong commitment to preserving the purity and integrity of the Icelandic language. The Icelandic Language Council, established in 2011, actively promotes the use of Icelandic in various domains, discouraging the adoption of loanwords and foreign expressions.

It's important to note that while Icelandic shares similarities with other Nordic languages, these unique features make it stand out and contribute to its distinct identity within the Scandinavian language family.
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