Learn Italian: Questo treno è molto sicuro.

Questo treno è molto sicuro.

This train is very safe.

Breakdown of Questo treno è molto sicuro.

Questions & Answers about Questo treno è molto sicuro.

Why does sicuro end in -o?

It is describing the noun treno (train), which is masculine and singular. Regular adjectives like sicuro change their endings to match the noun they describe. If we were talking about a feminine noun like macchina (car), it would be sicura.

Wait, if sicuro ends in -o to match treno, why doesn't molto change?

Here, molto means "very" and is acting as an adverb to make sicuro stronger. Adverbs never change their endings! Molto only changes its ending when it acts as an adjective describing a noun, meaning "many" or "a lot of" (for example, molti treni).

Does questo also change to match the noun?

Yes! Questo means "this" and it agrees with the noun it points to. It ends in -o because it goes with the masculine singular noun treno. If you were talking about a feminine noun, you would use questa.

Can sicuro also mean "sure"?

Exactly! Sicuro is a handy word that means either "safe" (like a safe train) or "sure" (like being sure of an answer). You have to use the context of the sentence to tell which one it is.