Words in This Story double-edged sword – n. something that has both good and bad parts or results ping – n. computer term to send a usually brief message (such as a text message) or notification to a person's phone vibrate – n. to move back and forth or from side to side with very short, quick movements access – n. a way of being able to use or get something addiction – n. a strong and harmful need to regularly have something (such as a drug) or do something (such as gamble) anxious – adj. afraid or nervous especially about what may happen neurological – n. the scientific study of the nervous system and the diseases that affect it alert – v. to make (someone) aware of something push notification – n. computer term A push notification is a message that pops up on a mobile device. App publishers can send them at any time; users don't have to be in the app or using their devices to receive them. clicks – n. computer term the act of selecting something on a computer screen by pressing a button on a mouse or some other device manipulate – v. to deal with or control (someone or something) in a clever and usually unfair or selfish way excite – v. to increase the activity of (something, such as nerve tissue) : a chemical that excites [=stimulates] the nerve cells in the brain