Questions & Answers about Hún skellir hurðinni.
Skellir is the 3rd person singular present tense form of the verb að skella.
So:
- að skella = the dictionary form, to slam / bang shut
- hún skellir = she slams
A useful pattern to notice is that many Icelandic verbs have these present-tense singular endings:
- ég skelli
- þú skellir
- hún/hann/það skellir
So the -ir ending here matches hún because the subject is 3rd person singular.
Because in this meaning, að skella commonly takes a dative object in Icelandic.
That is something learners often just have to memorize with the verb:
- skella e-u = slam something
where e-u stands for a noun in the dative
So:
- hurð = door
- hurðinni = the door in the dative singular
An English speaker may expect an accusative-style direct object, but Icelandic verbs often govern a specific case, and it is not always the one English would suggest.