underlay
/ˌʌndərˈleɪ/
verb
- To place something under another thing for support, cushioning, or protection.
- She decided to underlay the rug with a non-slip mat to prevent accidents.
- We need to underlay the carpet with a thick foam pad to make it softer.
- The roofer will underlay the shingles with a waterproof membrane.
Antonyms
noun
- A layer of material placed under a surface covering (such as carpet, flooring, or roofing) for cushioning, insulation, or protection.
- Make sure the underlay is smooth before laying the laminate flooring.
- The new carpet comes with a built-in underlay that reduces noise.
- A good underlay can extend the life of your roof by preventing moisture damage.