Which word means 'To enter something and spread thoroughly'?

• A. Penetrated
• B. Infiltrated
• C. Permeated
• D. Seeped

Answer: (C)

Think about something moving through and filling a space. Permeate captures that sense: to enter and spread through every part of a substance or area. If a smell permeates a room or water permeates fabric, it means it has gone everywhere, not just into one spot. That’s why it fits the prompt well—entering and spreading thoroughly.

The other words don’t convey that full, all-the-way diffusion as effectively. To penetrate means to enter or pierce a barrier, without necessarily filling or spreading. Infiltrate emphasizes secret or gradual entry into a system or group, not broad diffusion. Seep refers to slow leakage through small openings and often suggests only partial or edge-to-edge movement, not complete saturation. So the best choice is permeated.