Questions & Answers about Hléið er stutt, svo við drekkum vatn strax.
Because -ið is the definite article attached to the noun.
- hlé = a break / break
- hléið = the break
In Icelandic, the word for the is usually added to the end of the noun instead of written as a separate word.
So:
- hlé → break
- hléið → the break
That makes Hléið er stutt literally The break is short.
Because the adjective has to agree with the noun in gender, number, and case.
The noun hlé is neuter singular, so the adjective also takes the neuter singular form:
- masculine: stuttur
- feminine: stutt
- neuter: stutt
So:
- hlé is neuter
- therefore stutt is the correct form
This is a very common feature of Icelandic: adjectives change form depending on the noun they describe.