The Austronesian Comparative Dictionary

*ap(e)lag lying flat (of something that is usually upright, or in some other position)

PPh ap(e)lag lying flat (of something that is usually upright, or in some other position)

WMP
Bontok ʔaplag sleeping mat
Kankanaey men-aplág to lay the cloth, the mat; to make the bed
Ibaloy apdag to spread something --- of things that were folded or rolled (as rug, sleeping mat, blanket)
Casiguran Dumagat aplag to be lying over on a slant (of grass, growing rice, corn, etc.); to push grass over so that it is not standing straight up
Ilokano aplág to spread, unfurl (as a towel on the sand)
Ayta Abellan aplag lying as dead