At first, he was uncertain about naming the moves, but Ariha convinced him. He would need to name it if he were to teach it to anyone else. Most importantly, names have power... It was the aspiration of the name that resonated with the Way...
If he were to pick some lame name, there was a great chance his attack power would diminish, or would never reach the standard he wanted. Thankfully, picking a fitting name for the move hadn't been difficult. Karim or his master had already picked a good name for it. He just opted for a variation of the original name, adding his unique flair. After all, his move was distinct from Karim's.