Large group of similar things functioning together.

sparsely inhabited rural areas.

become aware of.

In a way that anyone can see, hear, use or know.

To examine in order to prevent errors/a problem.

forceful or violent effort to get free of restraint. Strong efforts made to do some things difficult. To try very hard to do something difficult.

To keep in check, manage, or control something.

container used as source of power. Portable devices that stores electricity.

imaginary. To act as if something is true when it is not.

parent of one's father or mother. Your mother or father's parent.

large natural elevation of earth's surface rising abruptly from surrounding level.

striving to achieve or attain something in face of difficulty or resistance. To try very hard to do something difficult.

feeling or showing appreciation for something done or received.

flowing naturally or supplied to building through pipes and taps. The act of moving your legs to move quickly. To depart or travel according to a schedule.

shallow trough for carrying rainwater off roof. Trough in which water flows into a drain. (of candle or flame) burn unsteadily.