v (intransitive) to dive, leap or rush (into water or some liquid); to submerge one's self
v (figuratively|intransitive) to fall or rush headlong into some thing, action, state or condition
v (intransitive) to pitch or throw one's self headlong or violently forward, as a horse does
v (intransitive|slang) to bet heavily and with seeming recklessness on a race, or other contest; in an extended sense, to risk large sums in hazardous speculations
v (intransitive|obsolete) to entangle or embarrass (mostly used in past participle)