Definition

A material placed underneath something else, often to provide support or cushioning, like felt under a carpet.

Example

The carpet felt much softer with the new underlay beneath it.

Conversation

I just bought a new carpet for my living room.

That sounds great! Did you get an underlay for it?

Yeah, I heard it helps with insulation and comfort.

Absolutely, it makes a big difference in how it feels underfoot.

Synonyms & Antonyms

Definition

To place something underneath another object for support or to raise it.

Example

The contractor decided to underlay the flooring with a layer of foam for better insulation.

Tense Forms

Conversation

I need to underlay my new carpet for better support.

That sounds like a good idea! What are you using?

I was thinking of using some old foam padding I have.

Root Explanation

Underlay → It is formed from "under" (from Old English "under", meaning beneath or below) and "lay" (from Old English "leah", meaning to place or put down). The word "underlay" means to place something beneath another object, often as a support or foundation.

Memory Tip

Think of placing something 'beneath' ('under') another item — that's what underlay means.

Visually Confused Words