plunge
verbUK /plʌndʒ/
US /plʌndʒ/
To jump or dive quickly into water.
She plunged into the pool with a big splash.
OTHER MEANINGS
2. To fall or drop suddenly and steeply.
The roller coaster plunged down the hill.
3. To push something quickly and firmly into something else.
He plunged his hands into his pockets.
4. A sudden fall or drop.
The stock market took a sharp plunge.