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Source: https://writers.stackexchange.com/a/10850
License name: CC BY-SA 3.0
License URL: https://creativecommons.org/licenses/by-sa/3.0/

I believe you need a nonbreaking hyphen. It'll keep the characters before and after it from breaking across lines. From [Butterick's Practical Typography](http://practicaltypography.com/nonbreaking-hyphens.html):

> Your word proces­sor as­sumes that any hy­phen marks a safe place to flow the text onto a new line or page. Sim­i­lar to the non­break­ing space, the non­break­ing hy­phen looks iden­ti­cal to a hy­phen but will not be used as a place for a line break or page break.

[In Word 2007](https://office.microsoft.com/en-us/word-help/insert-a-hyphen-HA010096395.aspx#BM2) for Windows, Press CTRL+SHIFT+HYPHEN. On Word for Mac 2010, press command-shift-dash or Insert \> Symbol \> Advanced Symbol.

Original score: 4