An event at which you learned something. encounter event or occurrence.

combine with another to form whole.

desegregated. To combine together; make into one thing.

distinctive attribute or aspect. Special reports in a magazine or paper. To highlight or give special importance to.

robot with human appearance.

area in which artillery can provide heavy firepower in support of other military units. An artillery base to support advancing troops.

before or by now or time in question.

To ask a series of questions to measure knowledge.

Group of homes built by government for poor people. To predict what will happen in the future.

begin or be reckoned from particular point in time or space.

violent collision. Sudden drops in value or amount. To be very tired and fall asleep.

growing and becoming more mature or elaborate. To grow bigger, more complex, or more advanced.

(of book etc.) prepared and issued for public sale. To release information to the general public.

To think creatively about; form mental picture of.

unwelcome or harmful matter. Some things difficult to deal with or causes troubles.