Breakdown of Das ist der alleredelste Hund der Welt.
sein
to be
der Hund
the dog
der
who, which, that (relative pronoun; die, das)
die Welt
the world
Questions & Answers about Das ist der alleredelste Hund der Welt.
How is the prefix aller- used in alleredelste?
The prefix aller- is attached to the superlative form of an adjective to make it even stronger, translating to "the very" or "of all". Here, it turns edelste (noblest) into alleredelste (the very noblest). It acts as a simple prefix and doesn't change how the adjective is declined.
What is the base adjective for alleredelste, and is its spelling regular?
The base adjective is edel (noble). Adjectives ending in -el drop the unaccented -e- in the comparative form (becoming edler), but they keep it in the superlative form. Therefore, the superlative stem is edelst-, which gives us alleredelste rather than "alleredleste".
Why does alleredelste end in just an -e?
Because it follows the definite article der, it takes the weak adjective declension. Hund is a masculine noun in the nominative case (since it follows the linking verb sein), so the weak ending is simply -e.
Why does the sentence use der Welt instead of "in der Welt" for "in the world"?