late 14c., "to put or thrust violently into," also intransitive, from Old French plongier "plunge, sink into; plunge into, dive in" (mid-12c., Modern French plonger), from Vulgar Latin *plumbicare "to heave the lead," from Latin plumbum "lead" (see plumb (n.)). Original notion perhaps is of a sounding lead or a fishing net weighted with lead. Related: Plunged; plunging. Plunging neckline attested from 1949.
plunge (n.)
c. 1400, "deep pool," from plunge (v.). From late 15c. as "a sudden pitch forward;" meaning "act of plunging" is from 1711. Figurative use in take the plunge "commit oneself" is from 1845, from earlier noun sense of "point of being in trouble or danger" (1530s).
例文
1. Take the opportunity to plunge yourself into your career.
チャンスをつかんで事業に身を投じる。
2.Local residents saw it plunge towards Earth with a deafening roar.
地元民は耳をつんざくような大きな音とともに地面にぶつかっているのを見た。
3.He braced himself for the icy plunge into the black water.
彼は冷たい汚水に飛び込む準備ができている。
4.This plunge came in a time of relatively benign economic conditions.
今回の急落は比較的良好な経済環境下に現れた。
5.The country,they say,will inevitably now plunge headlong into decadence.