Learn Finnish: Katselmuksen jälkeen asiantuntija löysi vakavan rikkomuksen. - After the inspection, the expert found a serious violation.

Katselmus comes from the verb katsella (to look at or view), and rikkomus comes from rikkoa (to break). The -mus suffix turns these verbs into abstract nouns representing the result or the act of doing them: an inspection and a violation.

What is the difference between a rikkomus and a rikos?

While both relate to breaking rules, rikos specifically means a crime (breaking the law). Rikkomus is a broader violation, infraction, or breach of rules, which perfectly fits the context of an inspection. Adding -mus to rikkoa focuses on the specific act of breaking a rule.

Why does rikkomus become rikkomuksen at the end of the sentence?

It is the total object of the sentence. Because the expert successfully completed the action of finding it (löysi), the object takes the accusative case, which looks identical to the genitive ending -n. The adjective vakava must also match this case, becoming vakavan.

Why does katselmus also end in -n (katselmuksen)? Is it also an object?