Index: customize-widgets.css
===================================================================
--- customize-widgets.css	(revision 36970)
+++ customize-widgets.css	(working copy)
@@ -245,6 +245,14 @@
 #available-widgets .widget .widget-description {
 	padding: 0;
 	color: #72777c;
+	overflow-wrap: break-word; 
+	word-wrap: break-word;
+	-ms-word-break: break-all; 
+	word-break: break-word; 
+	-ms-hyphens: auto;
+	-moz-hyphens: auto;
+	-webkit-hyphens: auto; 
+	hyphens: auto;
 }
 
 #customize-preview {
Index: widgets.css
===================================================================
--- widgets.css	(revision 36970)
+++ widgets.css	(working copy)
@@ -188,6 +188,14 @@
 	display: block;
 	padding: 10px 15px;
 	font-size: 12px;
+	overflow-wrap: break-word; 
+	word-wrap: break-word; 
+	-ms-word-break: break-all; 
+	word-break: break-word; 
+	-ms-hyphens: auto; 
+	-moz-hyphens: auto; 
+	-webkit-hyphens: auto; 
+	hyphens: auto; 
 }
 
 #available-widgets #widget-list {