Question: In the second theme of the recapitulation of Beethoven's Pathetique Sonata where the bass line goes into the treble clef and the bass register becomes part of the melody, I see the marking ***ben tenuto il basso***. I tried looking it up last night and couldn't find an answer. Google translate said that this means "well held down", but that wouldn't be the musical definition, I know it wouldn't.

From finding out that ben in Italian means well and my knowledge of Italian musical terms, here is the best that I could translate it to:

> 
> Well held in the bass
> 
> 
> 

So from that translation, here is what I think Beethoven is trying to get across with that marking:

> 
> Hold the bass notes as though there was a fermata in the bass, in other words, longer than your normal tenuto, while the melody is an accented staccato.
> 
> 
> 

**Is that what Beethoven is trying to get across with the marking?**

EDIT: Here is what I see in the Schirmer edition, or whenever I look at Sonata Album Book II published by the same people. I use the Schirmer edition, partly because it makes it so easy to see where the recapitulation starts. But here is what I see in that edition:

[![enter image description here](https://i.stack.imgur.com/klol4.png)](https://i.stack.imgur.com/klol4.png)

As you can see, ***ben tenuto il basso*** is clearly marked here under the same measure that has the poco crescendo marking.

Answer: 
Finding the edition the OP referred to (<https://imslp.org/wiki/Special:ImagefromIndex/11070/torat>) didn't take long.

It's the sort of marking that always reminds me of a John Cleese joke in *Fawlty Towers*: "You should be on *Mastermind*. Specialist subject, the bleedin' obvious."

Looking through the editors of editions on IMSPL to find somebody full of their own self importance who might write such a thing, my first guess was correct: Godowsky - the guy who rewrote 57 variations on the Chopin Etudes, because he didn't understand *why* the originals were so already so difficult, being unable to see past the mere technical problem of pressing down the piano keys in the right order.

So, it means absolutely nothing. As pidgin-Italian, it translates as something like "that bass line should be well held down, man!!"

The only logic for it that I can see is that Godowsky (not Beethoven!) decided the four notes in question ought to be slurred in two pairs, but playing the slurs that he invented for no reason is hard, so he decided to add some words saying "yes I really do mean this". 

Throw that edition away, and look at what *Beethoven* wrote. When *he* adds some textual instructions, they are always both practical and important. 

While I was writing this the OP posted an picture which confirms the source as the Godowsky edition. Schirmer just republish anything that is out of copyright, without bothering to say where they got it from. Before the internet, Schirmer editions were cheap, but mostly garbage. Now you can get better sources from the internet for free in sites like IMSLP, they are just garbage.
It simply means you need to play the bass tenuto. 

In this case I'd say he means the bass line in the treble clef, but it would help to see the relevant passage.

(To me tenuto and fermata are quite different, i.e. I wouldn't describe it like that. Tenuto means you should hold the note to the maximum full value, but definitely not exceed it. While fermata *does* give you that liberty - or rather even implores you to do so)