In Vim/Vi, how do you move the cursor to the end of the previous word?

Question

Unfortunately it's not a single key... but ge is what you're looking for, I think.

Try ge:

ge                      Backward to the end of word [count] |inclusive|.

                                                        *gE*
gE                      Backward to the end of WORD [count] |inclusive|.

as seen on VIM manual (section 03.1), you can use ge to go to the end of previous word

You may also want to do these to go to the space preceding a word (one character after ge: (both are only 2 keys)

1. FSpace will take you to the space after the previous word
2. Bh will also do that, in most cases.

The exception is when you are at the beginning of a line, in which case

3. k$ does something similar, in 3 keypresses