overdrive

overdrive
v. /oh'veuhr druyv"/; n. /oh"veuhr druyv'/, v., overdrove, overdriven, overdriving, n.
v.t.
1. to push or carry to excess; overwork.
2. to drive too hard.
n.
3. Mach., Auto. a device containing a gear set at such ratio and arrangement as to provide a drive shaft speed greater than the engine crankshaft speed.
4. Informal. an intense state of activity or productivity: The political campaign has shifted into overdrive.
[bef. 950; ME overdriven to cover over, overpower; OE oferdrifan to drive away, overthrow. See OVER-, DRIVE]

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