Tra từ lever - Từ điển Oxford Advanced Learner 8th

lever [lever levers levered levering] noun, verb BrE [ˈliːvə(r)] NAmE [ˈlevər]
noun
1. a handle used to operate a vehicle or piece of machinery
•Pull the lever towards you to adjust the speed.
see also ↑gear lever
2. a long piece of wood, metal, etc. used for lifting or opening sth by sb placing one end of it under an object and pushing down on the other end
•We had to use a lever to prise open the window.
3. ~ (for/against sth) an action that is used to put pressure on sb to do sth they do not want to do
•The threat of sanctions is our most powerful lever for peace.

Word Origin:
Middle English: from Old French levier, leveor, from lever ‘to lift’.

Example Bank:
•He threw a lever and the engines roared to life.
•If this allegation is true, it will give us a useful lever against him.
•Push the gear lever into first.
•Set all three levers to the 0 position.
•The machine is operated by means of a lever.
•The machine will stop immediately once the lever is released.
•This could serve as a powerful lever for peace.
•To release the brake, pull the lever towards you.
•Use a tyre lever to get the tyre off.
•When the lever is operated, the machine sews backwards.

verb
to move sth with a ↑lever
Syn: ↑prise
•~ sth + adv./prep. I levered the lid off the pot with a knife.
•~ sth + adj. They managed to lever the door open.
Verb forms:

Word Origin:
Middle English: from Old French levier, leveor, from lever ‘to lift’.

Example Bank:
•The intruders had levered off the bolts.