Step 1: Understanding the Question:
This question asks for the synonym of the capitalized word 'IMPERVIOUS'.
By defining the word and studying the physical qualities described in the options, we can select the closest match.
Step 2: Key Approach:
Analyze structural prefixes (like 'im-' meaning 'not') and physical properties to locate the closest synonym.
Consider the contexts of permeability and resistance to penetration.
Step 3: Detailed Explanation:
• Meaning of IMPERVIOUS: 'Impervious' means not allowing fluid to pass through, or unable to be affected or influenced by something.
Common synonyms include impermeable, impenetrable, and waterproof.
• Option A (permeable): This means allowing liquids or gases to pass through.
This is the direct antonym of 'impervious'.
• Option B (impenetrable): This means impossible to pass through or enter.
This directly aligns with the primary definition of 'impervious' (not letting anything pass through).
• Option C (absorbent): This means able to soak up liquid easily.
This is an antonym of 'impervious'.
• Option D (unsealed): This means not closed securely, allowing passage.
This is also an antonym of 'impervious'.
Step 4: Final Answer:
The word nearest in meaning to 'IMPERVIOUS' is 'impenetrable'.