Learn Finnish: Koira aiheuttaa meluhaittaa jatkuvasti. - The dog causes a noise nuisance constantly.

For animals, the pronoun "it" is se and its genitive is sen. However, to indicate reflexive ownership ("its own"), you omit the genitive pronoun and attach the possessive suffix -nsa/-nsä directly to the noun. This gives us Koira aiheuttaa meluhaittaansa. If you were to say Koira aiheuttaa sen meluhaittaa, it would mean the dog is causing another animal's noise nuisance!

Why is the object meluhaittaa in the partitive case here rather than the accusative?

The verb aiheuttaa (to cause) very frequently takes a partitive object because the thing being caused is typically abstract, uncountable, or viewed as an ongoing process. Here, a "noise nuisance" is treated as a continuous, unquantifiable problem rather than a single, fully completed, and countable entity.

Let's break down the word meluhaitta. Is this a common word?

Yes, it is a highly common official term. It is a compound of melu (noise) and haitta (nuisance, harm, or disadvantage). You will see meluhaitta frequently used in housing regulations, apartment building rules (järjestyssäännöt), and legal contexts to refer to a "noise disturbance."

How is the adverb jatkuvasti built from its root verb?