A point of no return — a boundary that, once crossed, commits you irrevocably to a course of action.
From the Rubicon River in northern Italy. When Julius Caesar crossed it with his army on January 10, 49 BCE, he committed an act of war against Rome — armies were forbidden from crossing the river toward the capital. He reportedly said "alea iacta est" (the die is cast).
Caesar crossed a tiny stream and changed the world. The Rubicon is barely a creek — you could wade across it. But the significance was never about the water. Every point of no return in your life probably looked small in the moment too.
Complete word intelligence in one call. Free tier — 50 lookups/day.