| black | (verb) make or become black | Synonyms: blacken, melanise, melanize |
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| clack | (verb) speak (about unimportant matters) rapidly and incessantly | Synonyms: blab, blabber, chatter, gabble, gibber, maunder, palaver, piffle, prate, prattle, tattle, tittle-tattle, twaddle |
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| (verb) make a clucking sounds, characteristic of hens | Synonyms: click, cluck |
| (verb) make a rattling sound | Synonyms: brattle, clatter |
| lack | (verb) be without | Synonyms: miss |
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| (verb) To be insufficiently prepared | - |
| shellack | (verb) cover with shellac | Synonyms: shellac |
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| slack | (verb) release tension on | - |
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| (verb) make less active or fast | Synonyms: relax, slack up, slacken |
| (verb) make less active or intense | Synonyms: abate, slake |
| (verb) become slow or slower | Synonyms: slacken, slow, slow down, slow up |
| (verb) cause to heat and crumble by treatment with water | Synonyms: slake |
| (verb) become less in amount or intensity | Synonyms: abate, die away, let up, slack off |
| (verb) be inattentive to, or neglect | - |
| (verb) avoid responsibilities and work, be idle | - |