[{"Bold_text": "verb (used with object)", "List Items": ["to cast or thrust forcibly or suddenly into something, as a liquid, a penetrable substance, a place, etc.; immerse; submerge:to plunge a dagger into one's heart.", "to bring suddenly or forcibly into some condition, situation, etc.:to plunge a country into war; to pull a switch and plunge a house into darkness.", "Horticulture.to place (a potted plant) up to its rim in soil or in certain other materials, as sand or moss.", "Surveying.to transit (the telescope of a transit or theodolite)."]}, {"Bold_text": "verb (used without object)", "List Items": ["to cast oneself, or fall as if cast, into water, a hole, etc.Synonyms: dive", "to rush or dash with headlong haste:to plunge through a crowd.Synonyms: hasten", "to bet or speculate recklessly:to plunge on the stock market.", "to throw oneself impetuously or abruptly into some condition, situation, matter, etc.:to plunge into debt.", "to descend abruptly or precipitously, as a cliff, road, etc.Synonyms: drop", "to pitch violently forward, as a horse, ship, etc."]}, {"Bold_text": "noun", "List Items": ["act of plunging.", "a leap or dive, as into water.", "a headlong or impetuous rush or dash:a plunge into danger.", "a sudden, violent pitching movement.", "a place for plunging or diving, as a swimming pool.", "Geology. pitch1(def45) pitch1(def45)."]}]