Antonyms — Identify the option that best expresses the opposite of ‘‘FICKLE’’ (capricious, changeable vs. firm and steady; vocabulary and word usage).

Given data

• Test word: FICKLE
• Options: Courageous; Sincere; Steadfast; Humble

Concept/Approach
‘‘Fickle’’ describes someone who changes frequently, lacking constancy.The opposite should capture firmness, constancy, and reliability.

Step-by-step reasoning
Fickle (inconstant) ↔ Steadfast (firm and unwavering).‘‘Courageous’’ relates to bravery; ‘‘Sincere’’ to honesty; ‘‘Humble’’ to modesty—none reverse changeability.

Verification/Alternative
Common antonym pair: fickle vs. steadfast/steady/constant.

Common pitfalls
Confusing moral/virtue words with the stability–variability axis tested here.

Final Answer
Antonym is Steadfast.