If someone offers you a pill that promises eternal life, don’t take the pill. It’s a panacea, a remedy that falsely claims to solve every problem ever.
The Greek word pan means “all” (think of a panorama, a view where you can see everywhere). The Greek word for “cure” is akēs (which looks like the word “aches”). Those are the roots of panacea, a cure for all aches. But a panacea doesn’t really cure everything; it just acts like it can. Use the word to describe an unbelievable solution, like a new law that will make everyone rich, or a robot that does your homework for you.