Enable word prediction on HTC One to have a suggestion for current word while typing. Next word prediction is also possible. To turn off or disable Word prediction or enable it do as follows:
1. Open “Settings” and go to “Language and Keyboard”
2. Tap “HTC Sense Input”
3. Tap “Advanced”
4. Make sure “Word Prediction” is marked (Suggestion for current word while typing
5. You may want have the next word predicted as well. To do so, make sure “Next word prediction” is marked.