Questions & Answers about Þakið á húsinu er rautt.
Þ (thorn) is a letter in Icelandic that represents the voiceless “th” sound, as in English thin.
Þakið is pronounced roughly THAH-kith (IPA: /ˈθaːkɪð/).
Icelandic marks the definite article as a suffix.
• Þak = “a roof” (indefinite).
• Þakið = “the roof” (definite).
Here -ið signals neuter singular definite in the nominative case (because it’s the subject).
The preposition á (“on”) takes the dative case when indicating a static location.
• hús (house) is neuter.
• Dative singular is húsi.
• Adding the definite suffix -nu gives húsinu (“the house” in dative).
So á húsinu = “on the house.”
Adjectives in predicative position (after er “is”) use the indefinite strong forms and agree with the noun’s gender, number, and case.
• Þakið is neuter singular nominative.
• The strong neuter nominative ending is -t, giving rautt (“red”).
Icelandic follows the verb-second (V2) rule: the finite verb (er) must be the second constituent.
• You can front a noun phrase or prepositional phrase (here Þakið á húsinu), but er stays in second position.
For an attributive adjective (before the noun), use the weak definite form:
• Neuter singular definite of rauður is rauta.
• Noun þak takes the suffix -ið.
Result: rauta þakið = “the red roof.”