Index: wp-content/themes/twentyfourteen/style.css
===================================================================
--- wp-content/themes/twentyfourteen/style.css	(revision 26346)
+++ wp-content/themes/twentyfourteen/style.css	(working copy)
@@ -1517,7 +1517,12 @@
  */
 
 .nav-links {
+	-webkit-hyphens: auto;
+	-moz-hyphens:    auto;
+	-ms-hyphens:     auto;
 	border-top: 1px solid rgba(0, 0, 0, 0.1);
+	hyphens:         auto;
+	word-wrap: break-word;
 }
 
 .post-navigation,