Simplify the following text for a Grade 5 native English-speaking person.
Original: Karate-do teaches ethical principles and can have spiritual significance to its adherents . Gichin Funakoshi ( `` Father of Modern Karate '' ) titled his autobiography Karate-Do : My Way of Life in recognition of the transforming nature of karate study .
Simplified: The full name of Karate is `` Karate-do '' which means `` the way of the empty hand '' in English .