ply

(plī)

1. To join together, as by molding or twisting.
2. To double over (cloth, for example).

1. A layer, as of doubled-over cloth or of paperboard.
2. One of the sheets of wood glued together to form plywood.
3. A layer of rubber-coated fabric, often of nylon or polyester cords, forming the body of an automobile tire.
4. One of the strands twisted together to make yarn, rope, or thread. Often used in combination: three-ply cord.
5. A bias; an inclination.

(plī)

1. To use diligently; wield: ply a knitting needle.
2. To engage in diligently; practice: plied the carpenter's trade. See Synonyms at handle.
3. To traverse or sail over regularly: Trading ships plied the routes between coastal ports.
4. To continue offering something to; ensure that (another) is abundantly served: plied their guests with excellent food.
5. To assail vigorously.

1. To traverse a route or course regularly: The boat plies between the islands on a weekly schedule.
2. To perform or work diligently or regularly: plied at the weaver's trade for 20 years.
3. Nautical To work against the wind by a zigzag course; tack.