visible – adj. of or relating to something that can be seen

credit card – n. a small plastic card that is used to buy things

surveillance – n. keeping close watch over someone

panic – n. a state or feeling of extreme fear that makes someone unable to act or think normally

witch hunt – n. the act of punishing people who are accused of having dangerous or evil ideas

introduce – v. to offer or propose

monitor – v. to watch, observe, listen to, or check (something) for a special purpose over a period of time

creep – v. to appear gradually and in a way that is difficult to notice