Cases of word usage

1) to question (a person) closely, especially to test answers given to someone else as in a law court (cross-examine)

2) (an instance of) the avoidance of waste of money, supplies, strength or anything else of value (economy)

3) not real; something made or done like something else (imitation)

4) a person pretending to be somebody else (especially in order to do something bad) (impostor)

5) immoral; combined with something else (impure)

6) the one, single, example; and no other; and nothing else or more; but it must me added that; (used to introduce a condition or reason) (only)

7) something growing out of something else (outgrowth)

8) (something) necessary as a condition for something else (prerequisite)

9) something that causes something else to go or stay away; unattractive; uninviting (repellent)

10) something in which something else is fixed or fastened; a position of an instrument such as 'high' or 'low'; the act of (the Sun, Moon etc) going down (setting)