Ratchet
/rˈætʃət/
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Definition
(noun) A pawl, click, or detent for holding or propelling a ratchet wheel, or ratch, etc.
Sentence Examples
We need to ratchet up the pressure. We can't let it simply subside.
Handcuffs are none other than a ratchet mechanism.
CEFR Practice Quiz
The mechanic used a ____ wrench to tighten the bolt in the confined space under the dashboard.