Translating the simple Italian sentence that DL gives us here can be tricky because there are a number of words in English related to the idea of below, down, under, etc. Here is one approach to finding a good translation.
The Italian sotto can be a preposition or an adverb. We know that in the DL sentence here it is an adverb, for two reasons. First, di sotto (as opposed to sotto alone) is always an adverb. Second, there is no noun or pronoun object after sotto here, so it must be an adverb rather than a preposition.
The English word “under” can sometimes be used as an adverb. For example: “She started swimming toward the shore but soon went under”. However, under is used as an adverb only with certain verbs, usually verbs indicating motion, such as “went” in the example just given. “You explore under the table”, using “under" as a preposition, would be a good English sentence; but “You explore under”, using “under” like an adverb, is not.
The English word “underneath” can be a preposition or an adverb, and it can be used adverbially in the DL sentence here: “You explore underneath”. A more literary equivalent of underneath is beneath.
The English word “below” can be a preposition or an adverb, and it can be used adverbially in the DL sentence here. (In fact it is the primary translation into English used by DL.): “You explore below”.
For more on the English words discussed here, see Practical English Usage Third Edition by Michael Swan, item 100 on p. 85.
I think that would be da sotto rather than di sotto
I'm confused... Why is "under" rejected as a valid translation? I checked a few online sources about the difference between "below" and "under" and it seems that they should be interchangeable here. For example in the context "We will check on the bridge and you check under." it is even better than "below".
nupogoci, "under" is usually a preposition. As such, it usually requires a word after it as object. So your sentence should be, for example, "... and you check under it". (You left out the "it".)
On the other hand, "below" is quite often used as an adverb as well as a preposition. It does not require an object to complete its meaning.
Instead of "below", you could also use "underneath", which is both an adverb and a preposition. Also possible is "beneath", which is similar to "underneath" but now sounds a bit dated except in rather formal contexts.
Please see also my longer comment on this page.
I listened to the sentence over and over and all I could hear on the last word. I thought it was suto, I could not hear the double T, in sotto, and the 'o' sounded more like 'u'. Interestingly, the second time it came up, it was a man's voice and it was perfectly understood compared to the first time which was a woman's voice.