insulator
🇺🇸
/ˈɪnsəleɪtər/
🇬🇧
/ˈɪnsjuleɪtə(r)/
something that stops heat, electricity, or sound from moving through it
Rubber is a good insulator that prevents electric shocks.
고무는 감전을 방지하는 좋은 절연체입니다.