Antonyms — Mark the word that is most nearly opposite in meaning to ‘‘NADIR’’ (high-frequency pair with ‘‘ZENITH’’).

Given data

• Word: NADIR = the lowest point
• Options: Modernity; Zenith; Liberty; Progress

Concept/Approach
The fixed antonym pair: nadir (lowest point) ↔ zenith (highest point).

Why others are wrong
Modernity/Liberty/Progress: unrelated semantic fields (time, freedom, development).

Memory tip
Sky metaphor: zenith is above; nadir is below.

Final Answer
Zenith