The word "nidar" refers to a specific type of Norse currency used in ancient times. It is pronounced as /ˈnɪdɑr/ in IPA phonetic transcription. The first syllable "ni" is pronounced as "ni" in "nitrogen" and the second syllable "dar" is pronounced as "dar" in "hard". The spelling of the word "nidar" can be confusing as it does not follow typical English spelling patterns. However, mastering the pronunciation and spelling of such unique words can broaden one's vocabulary and appreciation of other cultures.