plunge

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

To cast, stab or throw deep and fast into some thing, state, condition or action.

To baptize by immersion.

To dive, leap or rush (into water or some liquid); to submerge oneself.

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

To pitch or throw oneself headlong or violently forward, as a horse does.

To bet heavily and recklessly; to risk large sums in gambling.

To entangle or embarrass (mostly used in past participle).

To overwhelm, overpower.