Dative plural (-um, -unum)

The dative plural is one of the most predictable rules in Icelandic. Regardless of a noun's gender, the dative plural endings are universal:

  • Bare (indefinite): -um
  • Definite: -unum

You will use the dative case frequently after prepositions of location and origin, such as á (on/in), undir (under), hjá (next to), úr (out of), and af (off).

Bare Nouns (-um)

Use -um for indefinite groups of objects or people (like "pillows" or "shelves").

The cat is sleeping on pillows.
Kötturinn er að sofa á koddum.
I never drink from glasses.
Ég drekk aldrei úr glösum.
The boy takes the toys off shelves.
Strákurinn tekur leikföngin af hillum.

Definite Nouns (-unum)

Use -unum for specific, definite groups (like "the pillows" or "the shelves"). Compare these to the examples above:

The dog sleeps on the pillows.
Hundurinn sefur á koddunum.
The teacher sits next to the kids.
Kennarinn situr hjá krökkunum.
He takes the plates off the shelves.
Hann tekur diskana af hillunum.
They are coming out of the shops.
Þau koma úr búðunum.

Combining Phrases

Because this rule applies predictably across all noun genders, stacking multiple descriptive phrases is straightforward.

The books and the pens are on the desks under the lamps.
Bækurnar og pennarnir eru á skrifborðunum undir lömpunum.