Learn Finnish: Minä en haluaisi katsoa hyönteisiä. - I would not want to look at insects.

When forming the negative conditional, the negative verb (en, et, ei, etc.) shows who is doing the action, and the main verb loses its personal ending. The positive "I would want" is haluaisin, but in the negative, the -n drops off the end, leaving just en haluaisi.

Where is the word for "at" in this sentence?

The verb katsoa inherently means "to look at" or "to watch", so it doesn't need a separate preposition. Instead, katsoa requires the object you are looking at to be in the partitive case. That is why "insects" is in the partitive plural form hyönteisiä rather than the basic plural.

How do we get hyönteisiä from the basic word for "insect"?

The basic word for "insect" is hyönteinen. For Finnish words ending in -nen, the stem changes to -se- before adding endings. To make the partitive plural, we add the plural marker -i- and the partitive ending -ä, which turns hyönteise- into hyönteisiä.

Why does katsoa stay in its basic dictionary form?

The verb haluta (to want) always pairs with the basic dictionary form (the first infinitive) of the verb that follows it. Even though the first verb (haluaisi) is in the conditional mood, katsoa just stays exactly as it is.