Questions & Answers about Hún er með dökkt hár.
Why use er með ("is with") instead of the verb hafa ("to have")?
In Icelandic, you use vera með (to be with) to describe physical characteristics like hair, eye color, or things you are physically wearing or carrying right now. The verb hafa is generally used for abstract concepts (like having time or an idea) or owning things (like a house).
Why does the adjective end in a "-t" (dökkt instead of dökkur)?
Adjectives must match the gender of the noun they describe. The word for hair, hár, is a neuter noun. Therefore, the basic masculine adjective dökkur changes to its neuter form, dökkt.
Does the preposition með change the case of dökkt hár?
Yes. The preposition með can take either the accusative or dative case. When it means "having", "carrying", or describing physical features, it triggers the accusative case. Because hár is a neuter word, its accusative form looks exactly the same as its nominative (dictionary) form.
Is hár singular or plural here?
It is singular. Just like in English, the hair on a person's head is treated as an uncountable, singular mass. You just say hár, without any plural ending or article.