How do you use the word "alertness" in a sentence?

Q: How do you use the word "alertness" in a sentence?

Here are real-life examples of using "alertness": His thin, hawk-like nose gave his whole expression an air of alertness and decision. The researchers found that sugar increases tiredness and decreases alertness within an hour after consumption.

Alertness Meaning

/əˈlɝt.nəs/

Definition, CEFR level C1, pronunciation, examples, and quiz.

Definition

nounThe quality of being alert or on the alert.

Sentence Examples

His thin, hawk-like nose gave his whole expression an air of alertness and decision.

The researchers found that sugar increases tiredness and decreases alertness within an hour after consumption.

Synonyms & Antonyms

Synonyms:

vigilance

Antonyms:

None

CEFR Practice Quiz

Driving at night requires a high level of ____ to avoid accidents.

CEFR Practice Quiz (Alternate)

Her ____ at the crossing prevented a serious accident.

Word Origin & History

Etymology tree English alert Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English alertness From alert + -ness.

Literary Quotations & Historical Citations

"THE human body was meant to have a midafternoon nap, according to a new consensus among sleep researchers who are studying the biological rhythms of sleep and alertness." — 1989 September 12, Daniel Goleman, “Feeling Sleepy? An Urge to Nap Is Built In”, in The New York Times:

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