víðasta
The word "víðasta" is an Icelandic word. It is the superlative feminine/neuter form of the adjective "víður," meaning "wide" or "broad." Therefore, "víðasta" translates directly to "widest." This form would be used when referring to a feminine or neuter noun that is the widest among a group. For example, "hún bjó á víðasta svæðinu" translates to "she lived in the widest area." The masculine form of the superlative would be "víðastur."
Icelandic grammar involves declension of adjectives based on gender, number, and case. The superlative form indicates