# How to cope with hbox overfull caused by hyphenation problems?

I'm writing my thesis using a custom font instead of the default CMU Sans-serif. I happen to find that, with this font, my lines tend to be more likely to suffer hyphenation problems (or maybe it's just my imagination). Since I use technical terminology constantly (including acronyms, compound words, and in-line math mode), I regularly get the \hbox overfull error.

Here an example:

However, I feel that my lines really aren't that hard to hyphenate. I wonder whether there's something I can tweak to tell my compiler to try "a bit harder" to break lines properly and avoid the overfull error. In some cases I can manually suggest word hyphenation (especially in compound words), but there are other occasions, like the one of the example, where I simply don't know how to solve this issue without altering word choosing (i.e. I don't want to replace "promised" nor change the words in front of it).

• TeX doesn't hyphenate “promised” when the language is American English; but it can do prom-ised in British English. You can add \hyphenation{prom-ised} in your document preamble. – egreg Feb 15 at 10:17
• Certainly, I forgot to \usepackage[british]{babel}. This, however, doesn't solve the problem altogether (it still happens in other places). – Carles Araguz Feb 15 at 10:38