Plunged

verb

1. To thrust into liquid, or into any penetrable substance; to immerse.

   "to plunge the body into water"

2. To cast, stab or throw into some thing, state, condition or action.

   "to plunge a dagger into the breast;   to plunge a nation into war"

3. To baptize by immersion.
4. To dive, leap or rush (into water or some liquid); to submerge oneself.

   "he plunged into the river"

5. To fall or rush headlong into some thing, action, state or condition.

   "to plunge into debt;   to plunge into controversy"