- vt. 警告；使警觉，使意识到
- adj. 警惕的，警觉的；留心的
- n. 警戒，警惕；警报
- n. (Alert)人名；(西)阿莱尔特
CET4 TEM4 GRE 考 研 TOEFL CET6
来自意大利语all’erta. -erta, 同 erect，竖直。即全部到城墙上守城。
- alert:  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’.
- 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.
- 2. They want to be on the alert for similar buying opportunities.
- 3. The bank is alert to the danger.
- 4. All the Plymouth hospitals are on red alert.
- 5. Soldiers and police have been put on alert.
[ alert 造句 ]