Supine root word

The adjective is borrowed from Latin supīnus, from *sup- (see sub (“under”)) + -īnus (“of, pertaining to”).

1. What does the root word supine mean?
2. What is the prefix of supine?

What does the root word supine mean?

The adjective supine comes from a Latin word, supinus, which means “thrown backwards” or “inactive.” Whenever a person or animal is lying on its back, belly-up, it is supine. When your hand is open, palm-up, it is also supine.

What is the prefix of supine?

This word apparently came from the Proto-Indo-European (PIE) root of super "over, up" and sub "under, below" + -inus, a noun and adjective suffix.