Learn Finnish: Minä pakkaan tavarat isoon matkalaukkuun. - I am packing the items into the big suitcase.

To say "into" (the illative case), you usually double the last vowel of the word and add -n. Here, the adjective iso (big) becomes isoon, and the noun matkalaukku (suitcase) becomes matkalaukkuun.

Why does the word iso (big) change? Couldn't we just say iso matkalaukkuun?

In Finnish, adjectives have to match the noun they describe. Because the suitcase is in the "into" form (matkalaukkuun), the adjective describing it must also take that exact same form (isoon).

The dictionary form for 'to pack' is pakata. Where does the double 'k' in pakkaan come from?

The verb pakata is a Type 4 verb. When you conjugate it, the consonants get "stronger." Here, the single k strengthens into a double kk. With the ending for "I", this gives you the form pakkaan.

Why is there a -t at the end of tavarat?

The word tavara means "item" or "thing". The -t at the end is the standard plural ending, so tavarat means "items".

Is matkalaukku a compound word?