But if there are any rules for stressing three and more-syllable words, I do not know or have forgotten them. Words ending in -mento are usually masculine and stress the penultimate. Verbs in the infinitive usually stress the penultimate. And dictionaries often write words with an accent mark before the stressed syllable. Where Italian is MORE difficult than English is in the area of verbs.
Verbs change their endings for person, number, and tense.
We will look at verbs below. Again, once you learn the rules, you can pick up new verbs without any trouble. And nouns that end in io in the singular usually end in i, not ii, in the plural. Nouns that end in a in the singular end in e in the plural. Nouns that end in e in the singular end in i in the plural.