Tra từ plunge - Từ điển Oxford Advanced Learner 8th

plunge [plunge plunges plunged plunging] verb, noun BrE [plʌndʒ] NAmE [plʌndʒ]
verb
1. intransitive, transitive to move or make sb/sth move suddenly forwards and/or downwards
•+ adv./prep. She lost her balance and plunged 100 feet to her death.
•The train left the track and plunged down the embankment.
•~ sb/sth + adv./prep. The earthquake plunged entire towns over the edge of the cliffs.
2. intransitive (of prices, temperatures, etc.)to decrease suddenly and quickly
Syn: ↑plummet
•Stock markets plunged at the news of the coup.
•This year profits plunged by 40%.
3. intransitive + adv./prep. (of a road, surface, etc.)to slope down steeply
•The track plunged down into the valley.
4. intransitive to move up and down suddenly and violently
•The horse plunged and reared.
• (figurative)His heart plunged (= because of a strong emotion).
Verb forms:

Word Origin:
late Middle English: from Old French plungier ‘thrust down’, based on Latin plumbum ‘lead, plummet’.

Example Bank:
•A climber plunged 300 feet to his death.
•City officials are plunging ahead with plans for a new convention center.
•He plunged from a tenth floor window.
•She plunged straight into her story.
•The bus came off the road and plunged down an embankment.
•The car had plunged off the road.
•The car plunged headlong into the river.
Idiom: ↑take the plunge
Derived: ↑plunge in ▪ ↑plunge into something ▪ ↑plunge somebody into something ▪ ↑plunge something in ▪ ↑plunge something into something

noun usually singular
1. a sudden movement downwards or away from sth
Syn: ↑drop
•The calm water ends there and the river begins a headlong plunge.
2. ~ (in sth) a sudden decrease in an amount or the value of sth
Syn: ↑drop
•a dramatic plunge in profits
•a sharp plunge in the stock markets
•This increase reversed an earlier price plunge.
3. ~ into sth the act of becoming involved in a situation or activity
•The company is planning a deeper plunge into the commercial market.
4. an act of jumping or ↑diving into water; a quick swim
•He took the plunge into the deep end.
•She went for a plunge.

Word Origin:
late Middle English: from Old French plungier ‘thrust down’, based on Latin plumbum ‘lead, plummet’.

Example Bank:
•He finally took the plunge and gave in his notice.
•How did he survive his icy plunge?
•She prepared to take the plunge into the cold waters of Lake Ontario.
•The river takes a headlong plunge into a maelstrom of rocks and boulders.
•a plunge into the icy water
•a plunge to the ground
•his headlong plunge into shame and hypocrisy
•the economy's downward plunge