Sacudir and Percussion, Discussion, Concussion

Sacudir, Spanish for “to shake” comes from the Latin for the same, quatere.

From that same root, we get a bunch of English -cussion words, including:

• Discussion — that’s when you shake up what you’re talking about!
• Concussion — that’s when you shake someone so hard, they get hurt!
• Percussion — that’s when you shake the drums a lot!

You can see the s‑c in reverse in the Spanish sacudir and the -cussion words.