Answer:
1. To alert means to bring attention to something, usually to warn or notify others about a situation or potential danger.
2. If the lights flickered, they briefly blinked on and off, often indicating a temporary interruption in the power supply.
3. Something is irresistible when it's impossible to resist or refuse due to its attractiveness, appeal, or allure.
4. Artifacts are objects made or used by humans, often with historical, cultural, or archaeological significance. You might find them in museums, archaeological sites, or historical sites.
5. An example of something that vibrates is a guitar string when plucked.
6. To slurp a bowl of soup means to noisily and audibly consume the soup by inhaling it quickly, often with a sucking sound.