Breakdown of C'è un librone pesante sulla scrivania.
un
a / an (masculine)
pesante
heavy
c'è
there is / there are
su
on, about
Questions & Answers about C'è un librone pesante sulla scrivania.
What makes librone mean "big book"?
It uses the augmentative suffix -one, which is added to nouns to mean "big" or "large". You take the base word libro (book), drop the final vowel, and add -one to get librone.
How would I change the word if I wanted to talk about a "little book"?
You would use a diminutive suffix like -ino or -etto. By dropping the final -o from libro and adding the suffix, you get librino or libretto (a small book).
Since librone is masculine, shouldn't the adjective be pesanto?
Why is "on the" written as sulla instead of two separate words?
In Italian, when certain prepositions are followed by a definite article (a "the" word), they combine into one single word. Here, the preposition su (on) merges with the article la (the) to make sulla.