noun

• (botany) A sharp-pointed hollow hair seated on a gland which secretes an acrid fluid, as in nettles.
• (law enforcement) A police operation in which the police pretend to engage in criminal activity in order to catch a criminal.
  "The criminal gang was caught after a successful sting."
• (figurative) The harmful or painful part of something.
  "The ſting of death is ſinne, […]"

verb

• (ambitransitive) To hurt, usually by introducing poison or a sharp point, or both.
• (transitive, of an insect or arachnid) To puncture with the stinger.
  "A mosquito stung me on the arm."
• (intransitive, sometimes figurative) To hurt, to be in pain (physically or emotionally).
  "My eyes are stinging from the chopped onions."
• (figurative) To cause harm or pain to.
  "I thought I could park in front of the hotel, but they stung me for five pounds!"