Which word means not easily penetrated?

• A. GARRULOUS
• B. FERVID
• C. IMPERTURBABLE
• D. IMPERIOUS

Answer: (C)

Understanding nuance in vocabulary helps distinguish calm, steady traits from other intense or talkative qualities. Imperturbable is the best fit because it means not easily disturbed or upset—someone who stays calm and unmoved even under pressure. That sense of being unshakable aligns with “not easily penetrated” in a figurative way, referring to emotional or mental steadiness.

The other words point to different traits. Garrulous describes someone who talks a lot, which isn’t about emotional impact or steadiness. Fervid refers to intense passion or zeal, not about remaining calm under provocation. Imperious describes commanding, sometimes domineering behavior, which again isn’t about being unaffected or unperturbed.