Learn Icelandic: Fjandinn! Ég missti af strætónum.

By itself, the verb missa usually means "to lose" or "to drop" something. When you want to say you "missed" a vehicle, a flight, or an opportunity, you have to use the phrasal verb missa af.

Why does strætó become strætónum here?

The preposition af forces the following word into the dative case. Strætó is a masculine word, and because we are saying "the bus" (rather than just "a bus"), we add the masculine dative definite article suffix -num to the end of the word.

I thought "to miss" was sakna. Can I use missa af for people too?

No, Icelandic uses two different verbs for "missing." You use sakna when you emotionally miss a person, a pet, or a place. You use missa af only when you are too late for an event or a ride, like a bus, a movie, or a meeting.

What does fjandinn literally mean?

It literally translates to "the devil" or "the fiend." It is formed from the noun fjandi (fiend) plus the definite article -nn. In everyday Icelandic, it's a very common, mild swear word used exactly like "Damn!" or "Damn it!" in English.