ebb

• n. 減少する；干上がる；落ちる
• vi.減少する; 減少する; 下降する; 干潮; 引き潮

PIE *apo「離れる」から。語源的にはapo「遠地点」と同じ。

ebb

ebb: [OE] Water that is ebbing is literally going ‘off’ or ‘away’. The word comes from West Germanic *abjon, a noun formed from *ab, ancestor of modern English of, off, which denoted removal or departure.
=> of, off

ebb (n.)

Old English ebba "falling of the tide, low tide," perhaps from Proto-Germanic *af- (cognates: Old Frisian ebba, Old Saxon ebbiunga, Middle Dutch ebbe, Dutch eb, German Ebbe), from PIE root *apo- "off, away" (see apo-). Figurative sense of "decline, decay, gradual diminution" is from late 14c. Ebb-tide is from 1776.

ebb (v.)

Old English ebbian "flow back, subside," from the root of ebb (n.). Figurative use in late Old English. Related: Ebbed; ebbing.

1. We decided to leave on the ebb at six o 'clock next morning.

私たちは翌朝6時に干潮に乗じて離れることにしました。

2.The Government 's popularity is at its lowest ebb .

政府の支持率は最下位に転落した。

3.the ebb and flow of the tide

潮干満

4.Private and public virtues were at the lowest ebb .

公徳と私徳はいずれも衰退の中にある。

5.The flood and ebb tides alternates with each other.

満潮と干潮が交互に入れ替わる。