Questions & Answers about Ég er þreyttur, þess vegna fer ég heim strax.
Yes. þreyttur is an adjective describing the subject ég (I), and Icelandic adjectives agree with the noun/pronoun they describe in gender, number, and case.
- ég refers to a masculine speaker → nominative singular masculine → þreyttur.
If the speaker is feminine, you’d usually say: Ég er þreytt.
(Neuter also uses þreytt in the nominative singular.)
Icelandic commonly uses vera (to be) + adjective to express states/conditions, including tiredness. So Ég er þreyttur is literally “I am tired” in structure.
þess vegna means therefore / that’s why / for that reason. It’s historically made of:
- þess = genitive of það (“that/of that”)
- vegna = “because of” (a word that governs the genitive)
Together they function as a fixed adverbial phrase meaning “for that reason.”