How Potholes Form. Rainwater sinks through cracks in old or weakened asphalt. The water is soaked up by the mixture of rock, gravel, and sand that supports the road. Vehicles passing over the road force water through the soggy roadbed, eventually eroding parts of it.
disassemble The verb disassemble means to take something apart. It's one thing to disassemble a computer; it's a whole other thing to put it back together again.
Systematic describes something that is planned out and careful. In your systematic search for your mother's car keys, you start in one room, looking everywhere from bottom to top before moving to the next room. Use the adjective systematic to describe things that are orderly and efficient. The Latin root of systematic is systema, an arrangement or system.