Consider the following ridiculous example:
\documentclass{article}
\begin{document}
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
\end{document}
This produces an overfull hbox. I want to allow the word to break at any point, without a hyphen.
Of course, I can work around like this:
\documentclass{article}
\begin{document}
a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a\hspace{0pt}a
\end{document}
But this is far too ugly.
(I want to enable this only for a particular word, because I don't want my whole document to break.)
