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Questions & Answers about Katsoimme äärettömään horisonttiin.
How is the word äärettömään formed from its base form?
The base adjective is ääretön (infinite). As taught in this lesson, adjectives ending in the suffix -tön use the strong-grade stem -ttömä- when inflected. So, ääretön becomes the stem äärettömä-. To say "into the infinite", we add the illative case ending -Vn (matching the final vowel + n), resulting in äärettömään.
What is the root word behind the adjective ääretön?
It comes from the noun ääri, which means "edge", "boundary", or "limit". When you add the caritive suffix -tön (meaning "without"), the word literally means "without an edge" or "boundless"—which is how Finnish says "infinite".
Why are äärettömään horisonttiin in the illative case here?
The verb katsoa (to look) requires the illative case (the "into" case) when you are looking at a specific target or direction. While English says "looked at the horizon", Finnish treats the horizon as the destination of your gaze.
Doesn't the verb katsoa normally take the partitive case?