enter/o, col/o, colon/o
enter/o, col/o, colon/o mean intestine, with col/o and colon/o narrowing to the colon specifically (Greek).
"EN-ter-oh / KOH-loh." Coach: "Enter usually means intestine; col or colon narrows you to the colon."
Examples: enteritis, enteropathy, enteric, enteroscopy, gastroenteritis.
Also: enterocolitis, colitis, colonoscopy, colectomy, colorectal, colostomy, megacolon.