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to throw away the key

to throw away the key

12 8.8
Put someone in prison for life with no hope of release
  • idiom
  • Informal
translation icon : encerrar y tirar la llave
  • Lock him up and throw away the key.
  • lock 'em up, throw away the key
  • jail and throw away the key
  • going to throw away the key

No, they set it up as, you know, lock in a box and throw away the key.

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Examples

Synonyms

to put away
vsto throw away the key
115 5.8

To lock someone in prison or a secure place

means long or indefinite imprisonment with no hope of release or rehabilitation
to lock him up and throw away the key
vsto throw away the key
  • Informal
2 9.5

Put someone in prison and never let them out

focuses on punishment and permanent exclusion rather than rehabilitation
to lock up and toss the key
vsto throw away the key
  • Informal
9.3

Put someone in prison and never let them leave

is used literally and seriously rather than playfully

Antonyms

1.8

To let someone or something go free from being held

To help someone get back their health and normal life after illness, injury, or prison

How Severe

to throw away the key
  • Informal
12 8.8
to imprison
  • Formal
178 4.2
sentence
  • Specialized
659 7.0
to punish
821 1.0
to admonish
31 6.8

Surface Forms

throw away the key infinitive
throwing away the key present participle
throws away the key third person singular
thrown away the key past participle

Morphology

throw + away + the + key

The literal components ('throw away' + 'key') clearly evoke the image of discarding the means of release, so a learner who knows the words can infer a sense of preventing escape or release. However, the conventionalized meaning of permanent or indefinite imprisonment with no hope of release is an idiomatic extension that goes beyond the literal image and requires cultural/idiomatic knowledge, so it is not fully predictable from the parts alone.

Etymology

Throw away the key comes from the image of locking someone in and throwing away the key so no one can let them out. So it means 'to keep someone locked up for life'.