usually used in combination; one of several layers of cloth or paper or wood as in plywood
one of the strands twisted together to make yarn or rope or thread; often used in combination: "three-ply cord" or "four-ply yarn"
apply oneself diligently
- "Ply one's trade"
travel a route regularly
- "Ships ply the waters near the coast"
- "ply an axe"
- "ply your wits!"