Truck and axle

truck1

1.  Any of various heavy motor vehicles designed for carrying or pulling loads.
2. A hand truck.
3. A wheeled platform, sometimes equipped with a motor, for conveying loads in a warehouse or freight yard.
4. One of the swiveling frames of wheels under each end of a railroad car or trolley car.
5. A set of bookshelves mounted on four wheels or casters, used in libraries.
6. Nautical. A small piece of wood placed at the top of a mast or flagpole, usually having holes through which halyards can be passed.
7. Chiefly British. A railroad freight car without a top.

truck²

v., trucked, truck·ing, trucks.
v.tr.

1. To exchange; barter.
2. To peddle.

v.intr.
To have dealings or commerce; traffic.

n.

1. Articles of commerce; trade goods.
2. Garden produce raised for the market.
3. Informal. Worthless goods; stuff or rubbish: "Look at your hands. And look at your mouth. What is that truck?" (Mark Twain).
4. Barter; exchange.
5. Informal. Dealings; business: We'll have no further truck with them.

axle

n.

1. A supporting shaft or member on or with which a wheel or a set of wheels revolves.
2. 1. The spindle of an axletree.
   2. Either end of an axletree.