insulator
UK/'insjuleitә/US
A1
Definitions
n.
A material or device that does not let heat, electricity, or sound pass through it
绝缘体；隔热体（与导体相对）
Root Breakdown
Root-derivedinsulate + -or (agent/thing that does it) = a thing that insulates. Glass, rubber, and dry air are insulators — they refuse to let heat or electricity through. The opposite of a conductor.
Root insul still carries 7 more wordsExample Sentences
- 1.
Rubber is an excellent insulator, which is why gloves protect electricians.
- 2.
Air trapped in the feathers acts as a natural insulator against the cold.