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infiltrate sedative groggy melody sanction

infiltrate

in·fil·trate /ˈɪnfɪltreɪt $ ɪnˈfɪltreɪt, ˈɪnfɪl-/ verb

  1. [intransitive always + adverb/preposition, transitive] to secretly join an organization or enter a place in order to find information about it or harm it
    • Police attempts to infiltrate neo-Nazi groups were largely unsuccessful.
    • infiltrate into
      • Rebel forces have been infiltrating into the country.
  2. [transitive] to secretly put people into an organization or place in order to find out information or to harm it
    • infiltrate somebody into something
      • They repeatedly tried to infiltrate assassins into the palace.
  3. [transitive] to become part of something - used especially to show disapproval
    1. Commercialism has been infiltrating universities for the part decades.
  • infiltrator noun [countable]
  • infiltration /ˌɪnfɪlˈtreɪʃən/ noun [uncountable]

sedative

sed·a·tive /ˈsedətɪv/ noun [countable]

a drug used to make someone calm or go to sleep

  • sedative adjective

groggy

grog·gy /ˈɡrɒɡi $ ˈɡrɑːɡi/ adjective

weak and unable to move well or think clearly because you are ill or very tired

  • I felt really groggy after 15 hours on the plane.

melody

mel·o·dy /ˈmelədi/ noun (plural melodies)

  1. [countable] a song or tune
    1. They played some lovely melodies
    2. a haunting melody
  2. [uncountable] the arrangement of musical notes in a way that is pleasant

sanction

sanc·tion1 /ˈsæŋkʃən/ noun

  1. sanctions [plural] official orders or laws stopping trade, communication etc with another country, as a way to forcing its leaders to make political changes
    • sanctions against
      • US sanctions against Cube
      • a resolution to impose sanctions (=start using sanctions) on North Korea
      • the threat of trade sanctions
      • The UN Security Council may impose economic sanctions
      • Any talk about lifting sanctions (=ending them) is premature
  2. [uncountable] formal official permission, approval, or acceptance
    1. Apparently, the aide had acted without White House sanction
  3. [countable] formal a form of punishment that can be used if someone disobeys a rule or law
    1. the harshest possible sanction which could be imposed

Reference

  • Longman Dictionary of Contemporary English