Tap the top of your screen. Tap Aa. Tab over to More. Scroll down to Word Wise, and toggle the switch to on. Tap out of the menu and back into your book. If it doesn't activate right away, tap Word ...
You can easily restart your Kindle device if it freezes or stops responding to get it back to working.
You might want to change your Gmail name but keep your original email address. Here's how to do it through your settings.