Learn French: Je préfère improviser et manger n'importe quoi.

Rien means "anything" only in negative sentences (like "I don't want to eat anything"). Here, you are saying you do want to eat, and it doesn't matter what it is. N'importe quoi literally means "no matter what," so it's the perfect choice for "anything" or "whatever" in a positive, affirmative sentence.

I often hear people say n'importe quoi to mean "nonsense". Is that what it means here?

Context is key! When someone says C'est n'importe quoi !, it usually means "That's nonsense!" But when used as the direct object of an action verb like manger (to eat) or faire (to do), it simply takes its literal meaning: "no matter what" or "anything."

Why is there no preposition like de or à between préfère and improviser?

Some French verbs require a preposition before a following infinitive verb (like décider de or hésiter à), but préférer connects directly to the next verb without one. Other common verbs that do this include aimer, vouloir, and pouvoir.

Why does the accent change in préfère compared to its infinitive form préférer?