Definition

A material or substance that prevents heat, sound, or electricity from passing through, helping to keep things warm or quiet.

Example

The house has good insulation, which keeps it warm in winter.

Conversation

I just read about how important insulation is for keeping homes energy-efficient.

Yeah, I heard that it can really reduce heating costs.

Exactly! I think I need to check the insulation in my attic soon.

Good idea! It could make a big difference in your energy bills.

Synonyms & Antonyms

Root Explanation

Insulation is formed from "in-" (meaning not) and "salire" (meaning to leap or jump), combined with the suffix "-tion" (indicating the action or process). The word refers to the process of preventing heat, sound, or electricity from 'leaping' or transferring from one area to another.

Memory Tip

Think of 'not leaping' ('in-' means not and 'salire' means to leap) to remember that insulation prevents the transfer of heat or sound.

Visually Confused Words