Erfiðast
Erfiðast is an Icelandic adjective meaning “the most difficult” or “the hardest.” It is the superlative form of erfiður and is used to indicate the greatest degree of difficulty within a group of items, situations, or tasks. The word can modify a noun directly or appear in a predicate construction to compare alternatives.
Formation and usage: The base adjective erfiður yields erfiðast by adding the standard superlative suffix -ast.
Context and nuances: Erfiðast carries a neutral to formal tone and is widely applicable across domains, including