To make sure or certain of something (usually some future event or condition).
To make a pledge to (someone); to promise, guarantee (someone of something); to assure.
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 thrust into liquid, or into any penetrable substance; to immerse.
To cast, stab or throw into some thing, state, condition or action.
To remove a blockage by suction.
To dive, leap or rush (into water or some liquid); to submerge oneself.
Heavy and reckless betting in horse racing; hazardous speculation.
A dive, leap, rush, or pitch into (into water).
The act of plunging or submerging.
The act of pitching or throwing oneself headlong or violently forward, like an unruly horse.