Learn Swedish: Gudasagor är gamla men spännande.

It is made from gud (god) and sagor (tales). The -a- in the middle is a linking vowel (fogevokal). While we often use an -s- to glue words together in Swedish, compounds involving ancient people, groups, or gods frequently use an -a- instead, which is a leftover from older Swedish grammar.

Why does the adjective gammal change to gamla?

Adjectives must match the noun they describe. Because gudasagor is plural, the adjective must take the plural form. Gammal (old) is irregular: when adding the plural -a, it drops one m and the vowel before the l, becoming gamla.

If gamla has a plural ending, why doesn't spännande change to match the plural noun?

Spännande (exciting) ends in -ande, making it a present participle (a verb form acting as an adjective). In Swedish, adjectives ending in -ande or -ende are indeclinable. They never change their endings, regardless of whether the noun is plural, en, or ett.

Can I use myter instead of gudasagor for myths?