infiltrate sedative groggy melody sanction

infiltrate

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

[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.
[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.
[transitive] to become part of something - used especially to show disapproval
1. Commercialism has been infiltrating universities for the part decades.

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

a drug used to make someone calm or go to sleep

grog·gy /ˈɡrɒɡi $ ˈɡrɑːɡi/ adjective

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

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

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

sanc·tion1 /ˈsæŋkʃən/ noun

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
[uncountable] formal official permission, approval, or acceptance
1. Apparently, the aide had acted without White House sanction
[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