How do we know that Italian words come from accusatives, not ablatives?

1. What is the difference between dative and ablative?
2. What are the origins of Italian words?
3. Does Italian have declension?
4. What are accusative and ablative cases in Latin?

What is the difference between dative and ablative?

For example, the dative case is used to show indirect objects, or “to/for” expressions, and the ablative case is used to express means, manner, place, or time, and frequently without a preposition.

What are the origins of Italian words?

Italian is in fact the natural continuation of Latin and Ancient Greek: about 75% of the Italian words in use today are of Latin origin; likewise, a great number of technical, scientific, political, linguistic and religious terms to name a few are derived from Ancient Greek.

Does Italian have declension?

That the traditional declension classes of Italian differ greatly in productivity and lexical distribution is well known (cf. Dressler & Thornton 1996).

What are accusative and ablative cases in Latin?

Accusative (accusativus): Direct object of the verb and object with many prepositions. Ablative (ablativus): Used to show means, manner, place, and other circumstances. Usually translated by the objective with the prepositions "from, by, with, in, at."