Alert

Adjective

 * 1) Attentive; awake; on-guard.

Noun

 * 1) An alarm.
 * 2) A notification of higher importance than an advisory.

Verb

 * 1) To give warning to.

Adverbs for Alert
guardedly; extremely; wisely; resolutely; diabolically;  eternally;  zealously;  embarrassingly; cautiously; suspiciously; terribly; comically; capably; amazingly; inordinately; passably; incessantly; mentally; nervously;  uncommonly;  keenly;  coolly;  warily; sharply;  suavely; briskly; swiftly; signally.

Synonyms for Alert
active, lively, prompt, brisk, ready, wide-awake, watchful, prepared, vigilant.

Antonyms for Alert
heavy, dull, slow, drowsy, sluggish, lethargic, inattentive, inobservant.

Thesaurus
active; admonish; advertent; advise; agile; agog; air-raid alarm; alarm; alarm bell; alarm clock; alarm signal; alarum; alert for; alive; all clear; all ears; all eyes; animated; apt; arouse; assiduous; attentive; awake; aware; beacon; blinking light; brainy; breathe; bright; brilliant; burglar alarm; buzz; buzzer; cant; careful; caution; cautious; clear-sighted; clear-witted; clearheaded; clever; concentrated; confide; confide to; conscious; crostarie; cry havoc; cry wolf; decisive; diligent; earnest; entrust with information; equal to; expeditious; fiery cross; finical; finicking; finicky; fire alarm; fire bell; fire flag; five-minute gun; flashing light; fly storm warnings; fog bell; fog signal; foghorn; forewarn; frighten; frisky; full of life; gale warning; gay; give confidential information; give fair warning; give notice; give warning; heedful; hooter; horn; hue and cry; hurricane warning; immediate; instant; instantaneous; intense; intent; intentive; issue an ultimatum; keen; knowing; let in on; let next to; lighthouse; lively; loaded for; lookout; mention privately; mercurial; meticulous; mindful; nice; niggling; nimble; note of alarm; notify; observant; observing; occulting light; on guard; on the; on the alert; on the ball; on the job; on the lookout; open-eared; open-eyed; openmouthed; police whistle; prepared for; prompt; punctual; put hep; put next to; qui vive; quick; quick-witted; ready; ready for; regardful; sharp; signal; signal of distress; siren; sleepless; small-craft warning; smart; sound the alarm; sound the tocsin; speedy; spirited; sprightly; spry; startle; still alarm; storm cone; storm flag; storm warning; summary; swift; threaten; tip; tip off; tocsin; two-minute gun; unblinking; unnodding; unsleeping; unwinking; up; up for; up to; upside-down flag; utter a caveat; vigilant; vivacious; wakeful; warn; warn against; warning; wary; watchful; whisper; whistle; wide awake; wide-awake

Etymology
From alerte:, from the phrase à l'erte:, from  all'erta: from erta:.

Pronunciation