Which one of the following options is the closest in meaning to the word given…

Definition: "Nadir" — the lowest point; a moment of greatest adversity, decline, or unhappiness.

Part of speech: noun

Example: The nadir of their fortunes came after the market crash.

Antonym: zenith (the highest point).

• Memory tip: associate "nadir" with "down" or the lowest moment.

• Usage: commonly used to describe low points in fortunes, mood, reputation, or performance.