nadir

meaning in plain English

The lowest or worst point of something, like when things couldn’t get any worse.

Picture a tiny dip at the bottom of a roller-coaster track— that low spot is the nadir, the worst point.

for example

After months of bad luck, his career finally hit rock bottom at its absolute nadir.

Imagine you’re climbing a mountain and slip to the very bottom—that’s the nadir of your hike. Why does it feel so final? Because from there, the only way is up.