tentacle

/ˈtɛntəkəl/
noun
  1. A long, thin, flexible arm-like part of some animals, such as octopuses, squids, and jellyfish, used for feeling, grasping, or moving.
    • The octopus used one of its tentacles to grab a crab from the ocean floor.
    • A jellyfish's tentacles can sting even after the animal is dead.
    • The diver watched in awe as the squid's tentacles reached out into the dark water.
  2. Something that spreads out and influences or controls many things, often in a hidden or gradual way.
    • The secret organization extended its tentacles into the government.
    • The corporation's tentacles reached into every corner of the local economy.
    • Social media has tentacles that affect how we think and behave.
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