รองพื้น(rong péun)

Meanings

3VerbB2

[to] prime [sth]; apply a base layer

to put a first, preparatory layer on [sth] (e.g., foundation on the face, primer on a surface) to improve later coats or finishes

Examples

If you want the wall paint to be smooth, you should apply a coat of primer first.
4NounC1

underlayment; base layer

a material layer laid beneath a finish surface (e.g., floor underlay, blinding concrete) to provide support or a smooth base