Definition of deep-six in English:

deep-six

Line breaks: deep-six

verb

[with object] North American informal
Destroy or dispose of (something) irretrievably: someone had deliberately deep-sixed evidence
More example sentences
  • They never really wanted to offend their corporate contributors, and now that the elections are over, they've deep-sixed any action to stop this tax scam.
  • The government clearly had no use for the commission's 1979 report and deep-sixed it on arrival.
  • Robbins should have deep-sixed the sentimental scenes and given us more caricature.

Origin

1920s (as the deep six 'the grave'): perhaps from the custom of burial at sea at a depth of six fathoms.

Definition of deep-six in:

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Word of the day demoralize
Pronunciation: dɪˈmɒrəlʌɪz
verb
cause (someone) to lose confidence or hope