Alert and Idle

Alert

Alert adjective - Having or showing the ability to respond without delay or hesitation.
Usage example: an alert force of commandos, ready to go on a mission at a moment's notice

Idle is an antonym for alert.

Nearby Words: alertness, alerted, alerting, alerter

Idle

Idle adjective - Not being in a state of use, activity, or employment.

Alert is an antonym for idle.

Nearby Words: idled, idleness, idler, idling, idly

Both words in one sentence

  • Video Game / Black Mesa Their reaction times are three tenths of a second to fire when they're idle, and one tenth of a second to fire if they're alert.
Cite this Source
Idle and Alert. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/alert/idle
Alert & Idle. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/alert/idle>.
Idle or Alert. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/alert/idle.
Google Ngram Viewer shows how "alert" and "idle" have occurred on timeline