cañón
/kaˈɲon/ · B1 · adj
powerful, intense, difficult
🎋🏜️ caña (reed, tube) + -ón (big) = a big tube: cannon, gun barrel, canyon
A hollow cane is a tube. Make it big and you get a cannon, a gun barrel, or a canyon, which is a long channel cut through rock. In Mexican slang, ¡está cañón! means it's tough or intense, as hard-hitting as a cannon.