Thanks Alexander Rezinsky <alexrez@gmail.com>!
 static int borderpx = 2;
 static char shell[] = "/bin/sh";
 
-/* timeouts (in milliseconds) */
+/*
+ * word delimiter string
+ *
+ * More advanced example: " `'\"()[]{}"
+ */
+static char worddelimiters[] = " ";
+
+/* selection timeouts (in milliseconds) */
 static unsigned int doubleclicktimeout = 300;
 static unsigned int tripleclicktimeout = 600;
 
 
                                }
                        }
 
-                       if(term.line[*y][*x + direction].c[0] == ' ')
+                       if(strchr(worddelimiters,
+                                       term.line[*y][*x + direction].c[0])) {
                                break;
+                       }
 
                        *x += direction;
                }