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Definition of do in phrasal verb from the Oxford Advanced Learner's Dictionary

do in

phrasal verb
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do somebody/yourself in (informal)
  1. to kill somebody/yourself
  2. [usually passive] to make somebody very tired
    • Come and sit down—you look done in.
do something in
  1. (informal) to injure a part of the body
    • He did his back in lifting heavy furniture.
See do in in the Oxford Advanced American Dictionary
biodegradable
adjective
 
 
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The environment
C1
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