Alert vs Still sharp

When to use each in English, with meaning, register, and examples.

Alert

Top 1,000 (very common)C1verb

Still sharp

Beyond 10,000 (less common)
Most common: Alert
 AlertStill sharp
Pronunciation🇬🇧 /["/əˈlɜːt/","/əˈlɜːts/","/əˈlɜːtɪd/","/əˈlɜːtɪŋ/"]/🇺🇸 /["/əˈlɜːrt/","/əˈlɜːrts/","/əˈlɜːrtɪd/","/əˈlɜːrtɪŋ/"]/🇬🇧 //stɪl ʃɑːp//🇺🇸 //stɪl ʃɑrp//
MeaningAware and paying attention; quick to notice things.Not losing skills or abilities over time.
ExampleNeighbours quickly alerted the emergency services.Even at 80, she is still sharp and solves puzzles effortlessly.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Beyond 10,000 (less common)
CEFR levelC1-
Part of speechverb
Collocationsstay alert, alert to danger, make someone alert, be alert for signsstill sharp mind, still sharp skills, still sharp wit
Antonymsunaware, distracted, sleepydull, blunt, inept
Common mistakes'Alert' used as a noun instead of an adjective., Confused with 'alarmed', which means frightened., Using 'alerts' incorrectly as a verb form.Confused with 'still' meaning 'not yet'., Using it inappropriately to describe objects that have lost their qualities.
Usage notesUse 'alert' to describe someone who is attentive. It can be used in formal and informal contexts, but avoid using it in very casual conversations.Use in contexts where persistence or continued ability is emphasized; avoid in very formal settings.

See it in real clips

Still sharp

Frequently asked questions: Alert vs Still sharp

What's the difference between Alert and Still sharp?

Alert: Aware and paying attention; quick to notice things. Still sharp: Not losing skills or abilities over time.

Which is more common: Alert and Still sharp?

Alert is the most common in everyday English.

Can you show an example of each?

Alert: Neighbours quickly alerted the emergency services. Still sharp: Even at 80, she is still sharp and solves puzzles effortlessly.

Can I use Alert and Still sharp interchangeably?

Not always. Alert and Still sharp are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

Related comparisons