• vt. 警告；使警覺，使意識到
• adj. 警惕的，警覺的；留心的
• n. 警戒，警惕；警報
• n. (Alert)人名；(西)阿萊爾特

來自意大利語all’erta. -erta, 同 erect，豎直。即全部到城墻上守城。

alert

alert: [17] Alert comes, via French, from an Italian phrase all’ erta ‘on the look-out’, or literally ‘at the (alla) watch-tower (erta)’. Erta was short for torre erta, literally ‘high tower’, in which the adjective erta ‘high’ came ultimately from Latin ērectus, the past participle of ērigere ‘raise’.
=> erect

alert (adv.)

"on the watch," 1590s, from French alerte "vigilant" (17c.), from phrase à l'erte "on the watch," from Italian all'erta "to the height," from erta "lookout, high tower," noun use of fem. of erto, past participle of ergere "raise up," from Latin erigere "raise" (see erect). The adjective is attested from 1610s, the noun from 1803, and the verb from 1868. Related: Alerted; alerting.

1. The armed forces were on high alert to guard against any retaliation.

武裝部隊保持高度戒備，以防發生任何報復行動。

來自柯林斯例句

2. They want to be on the alert for similar buying opportunities.

他們希望隨時掌握有關類似購買機會的信息。

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3. The bank is alert to the danger.

銀行充分意識到了危險。

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4. All the Plymouth hospitals are on red alert.

普利茅斯所有的醫院都處于緊急狀態之中。

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5. Soldiers and police have been put on alert.

士兵和警方都已進入警戒狀態。

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