Strákurinn grætur stundum í biðstofunni.

Word-by-word:

• strákurinn = the boy

  • strákur = boy
  • -inn = the (masculine singular nominative ending)

• grætur = cries / is crying

  • 3rd person singular present of gráta (to cry, to weep)

• stundum = sometimes

• í = in

• biðstofunni = the waiting room

  • biðstofa = waiting room
  • -unni = the (feminine singular dative ending)

So literally: Boy-the cries sometimes in waiting-room-the.

Strákurinn has the definite ending -inn, so it means the boy, not just a boy.

• strákur = a boy (indefinite)
• strákurinn = the boy (definite)

Icelandic usually attaches the definite article as an ending to the noun instead of using a separate word like English the.

If you wanted A boy sometimes cries in a waiting room, you could say:

• Strákur grætur stundum í biðstofu.

Icelandic does not normally use a separate article like English the. Instead, it adds a definite ending to the noun:

• Masculine: strákur → strákurinn (the boy)
• Feminine: biðstofa → biðstofan (the waiting room, nominative)
• Dative feminine definite: biðstofu → biðstofunni

So -inn and -unni are functioning as the.
That is why you do not see a separate little word meaning the in the sentence.

Grætur is the simple present tense of gráta (to cry):

• hann grætur = he cries or he is crying

Icelandic does not distinguish as strictly as English between simple and continuous in the present. Context decides:

• With stundum (sometimes), it describes a repeated/habitual action:
  • Strákurinn grætur stundum í biðstofunni.
    = The boy sometimes cries in the waiting room.

If you specifically want the English-style is crying (right now), you can also use:

• Strákurinn er að gráta. = The boy is crying.

But with stundum, the simple present grætur already works very naturally.

In a normal main clause, Icelandic strongly prefers the finite verb in second position (the “V2” rule):

1. First position: usually the subject (Strákurinn)
2. Second position: the finite verb (grætur)
3. Then come adverbs like stundum

So:

• ✅ Strákurinn grætur stundum í biðstofunni. (natural)
• ❌ Strákurinn stundum grætur í biðstofunni. (sounds wrong/unnatural)

You can move stundum to the front for emphasis:

• Stundum grætur strákurinn í biðstofunni.
  = Sometimes, the boy cries in the waiting room. (focus on sometimes)

But the verb grætur still stays in second position.

Common natural options:

1. Strákurinn grætur stundum í biðstofunni.
   = neutral word order, light emphasis on the boy.

2. Stundum grætur strákurinn í biðstofunni.
   = puts more emphasis on sometimes (similar to English Sometimes the boy cries...).

Both mean the same basic thing: the boy occasionally cries there. The difference is more about emphasis / information structure than about grammar or core meaning.

Three things are happening in í biðstofunni:

1. The preposition í

   • When it means in (location, not movement), í takes the dative case.

2. The noun in the right case

   • biðstofa (waiting room, nominative)
   • Dative singular indefinite: biðstofu

3. Definite ending in dative

   • Dative definite feminine singular of biðstofa is biðstofunni
     (stem biðstofu-
     • ending -nni).

So:

• í biðstofu = in a waiting room (indefinite, dative)
• í biðstofunni = in the waiting room (definite, dative)

Your sentence uses the waiting room, so it must be í biðstofunni.

The ending -unni on biðstofunni expresses two things at once:

1. Definiteness (the)

   • It turns biðstofa (waiting room) into the waiting room.

2. Case (dative singular feminine)

   • Required because the preposition í with a location meaning (“in”) governs the dative.

Pattern for a typical weak feminine noun like biðstofa:

• Nominative: biðstofan (the waiting room – subject)
• Accusative: biðstofuna
• Dative: biðstofunni ← used after í here
• Genitive: biðstofunnar

So -unni is “dative + definite” in one.

Indefinite (no the):

• Strákur grætur stundum í biðstofu.
  = A boy sometimes cries in a waiting room.

Changes:

• strákurinn → strákur (drop the definite ending)
• biðstofunni → biðstofu (dative singular indefinite)

The verb and stundum remain the same.

Approximate pronunciation (not strict IPA, but close enough for an English speaker):

• Strákurinn ≈ STRAW-kur-in

  • á like ow in cow, but shorter and tenser
  • stress on the first syllable: STRÁ-kur-inn

• grætur ≈ GRY-tur

  • æ like the vowel in eye
  • r is tapped or rolled

• stundum ≈ STOON-dum

  • u like the u in put or book (but a bit tenser)
  • stress on STUN

• í ≈ ee in see

• biðstofunni ≈ BITH-sto-vu-nni

  • ð is a soft th as in this
  • o similar to aw in law (depending on accent)
  • nn often pronounced like dn or tn in fast speech
  • primary stress on BIÐ, secondary on STO

Very rough overall: STRAW-kur-in GRY-tur STUN-dum ee BITH-sto-vu-nni.

• gráta is the infinitive: to cry

  • You’ll see it after að: að gráta = to cry

• grætur is the 3rd person singular present form: he/she/it cries

  • hann grætur = he cries / he is crying

A few more forms for context:

• ég græt = I cry
• við grátum = we cry
• þeir gráta = they cry

The vowel change (á → æ) is a typical strong-verb pattern in Icelandic.

Yes. A common synonym for strákur is drengur.

• Drengurinn grætur stundum í biðstofunni.

Both mean roughly The boy sometimes cries in the waiting room.

Nuance:

• strákur is very common and slightly more colloquial / everyday.
• drengur can sound a bit more formal or old-fashioned in some contexts, but it’s still normal Icelandic.

Grammatically, everything else stays the same.