Learn Hardcore Icelandic: Ég geng að sundlauginni.

Geng is the first-person singular present tense form of the verb að ganga, which means "to walk". In this sentence, it translates as "I walk."

How does the preposition að function here?

In this sentence, að is used to indicate direction or destination (similar to "to" in English). When using að with a noun in Icelandic, the noun typically appears in the dative case.

Why is sundlauginni spelled with the ending -inni instead of just sundlaug?

Sundlauginni is the definite form of sundlaug (meaning "swimming pool") in the dative case. In Icelandic, definite articles are added as suffixes to the noun, and when a noun is governed by a preposition like að, it often appears in the dative. The ending -inni both marks the noun as definite (the swimming pool) and dative (indicating "to the swimming pool").

How does Icelandic indicate definiteness differently from English?

Unlike English, where a separate word ("the") precedes a noun, Icelandic attaches the definite article to the end of the noun as a suffix. In sundlauginni, the element -in (combined with the dative ending -ni) shows that the noun is definite and in the correct case required by the preposition að.

Does the structure of this sentence differ significantly from similar English sentences?

Not really. The structure is similar: subject (Ég/I), verb (geng/walk), and prepositional phrase (að sundlauginni/to the swimming pool). However, Icelandic requires the noun to be inflected for case and definiteness, which is a grammatical feature not found in English.

Why is the dative case used in the phrase að sundlauginni?

The dative case is used because the preposition að governs the dative when indicating movement toward a destination. This means that the noun following að must be modified to show that it is in the dative case, which in the case of sundlaug becomes sundlauginni.