"Sicuramente è il giocattolo più divertente."

Translation: Certainly it is the most fun toy.

[Brian175111]

It is terrible British and Australian English. Only the Americans use "fun" in this way. We would say something like "Certainly, it is the most entertaining toy"

[Dick403354]

A horrible English sentence!

[wjones451]

Is there no difference between more and most? I'm not sure why "more entertaining" doesn't work here.

[TheGandalf]

I've finally figured it out. When "il" is used with "più", it means "most", and when there's no article, it means "more". I think.

[xyphax]

You have it correct, although di più can also be the comparative form of 'much'. Here is a trustworthy explanation:

much .. molto .. adverb
more .. più, di più .. comparative
the most .. (il) più .. relative superlative
very much .. moltissimo .. absolute superlative

From: Italian Verbs and Essentials of Grammar, Carlo Graziano, 1987, p. 147

'Certain adverbs have irregular comparative, relative superlative, and absolute superlative forms.'

BTW - bene, male, and poco are also listed

well .. bene .. adverb
better .. meglio .. comparative
the best .. (il) meglio .. relative superlative
very well .. ottimamente .. absolute superlative

I thought the word reference for più was also was interesting to peruse, it shows a lot of other words used with it.

http://www.wordreference.com/iten/pi%C3%B9

[Raymond304505]

surely it is the the most fun toy.
not accepted.
perche?

[JoyReynold]

The translation is very American. we wouldn't say this in Engish

[wiplala]

più divertente = more entertaining "IL più divertente" = the most entertaining

[TheGandalf]

Why can't "more" be used here?

Also, I like how "divertente" sounds like "diversion". :) Divert your enemies with entertaining toys!

[ElHeim]

Sounds like "diversion" because it comes from the same root :-) Even in English, "to divert" may main "to distract the attention", which can be applied to military tactics or to amusement :P