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truth serum Syllabification: truth se·rum
Pronunciation: /tro͞oTH drəɡ/
(also truth drug)

Definition of truth serum in English:


A drug supposedly able to induce a state in which a person answers questions truthfully.
Example sentences
  • I'm also going to administer the truth drug here as well, ‘he said touching the tube connected to the man's leg.’
  • If you took a truth drug, what would you be worried about divulging?
  • As he explained, it can refer to anything from the use of so-called truth drugs to application of one or another method of torture.
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