SpeakUP Academy
Descubre tu nivel
HomePrefixeschron-
ESEN

Prefix · time · temporal order

chron-

Means "time": chronology, chronic, synchronize, anachronism, chronicle.

In Spanish: cron-Scientific

Written by Bryan López, English teacher · Updated July 2026

Time, temporal order, duration

Chron- (also chrono-) comes from Greek "chronos" (time) and appears in historical, medical, scientific, and technological vocabulary. Chronology = the arrangement of events in time sequence; chronic = lasting a long time or recurring; synchronize = to make things happen at the same time (syn- = together); anachronism = something existing outside its correct time period (ana- = against); chronicle = a detailed record of events in chronological order. The Spanish equivalent is "cron-": cronología, crónico, sincronizar, anacronismo, crónica.

Chronos the god and time in science

Chronos was the Greek god of time, distinct from Kronos the titan. Chron- appears in technology: chronometer (a precision timekeeping instrument), chronograph (a stopwatch or instrument recording time). In medicine: chronic (lasting more than three months) vs. acute (sudden onset). In computing: cron (UNIX) is a task scheduler running jobs at specified times — the word comes directly from chronos.

How it is used

Combines with Greek roots to indicate a relationship with time:

  • chron- / chrono- + measurement/order
    ology → chronologymeter → chronometergraph → chronographicle → chronicleological → chronological
  • prefix + chron- (position in time)
    syn → synchronizeana → anachronisma → achroniciso → isochronous

Pronunciation: /krɒn/. Spanish equivalent "cron-": cronología (chronology), crónico (chronic), sincronizar (synchronize), anacronismo (anachronism), crónica (chronicle), cronómetro (chronometer). The "ch" is pronounced /k/.

How it is pronounced

chron-/krɒn/

Tap the button to hear how the prefix sounds. Each word in the table has its own audio.

Examples

Root word
With chron-
In a phrase
  • ologychronologyThe historians compiled a precise chronology of events leading up to the war.
  • icchronicShe had suffered from chronic back pain for over a decade and tried every treatment.
  • syn + izesynchronizeThe director asked all performers to synchronize their movements to the exact beat.
  • ana + ismanachronismThe knight using a mobile phone was a deliberate anachronism in the modern retelling.
  • iclechronicleThe Chronicles of Narnia takes its title from the word for a detailed historical record.
  • ometerchronometerSailors once relied on a chronometer to calculate longitude at sea with great accuracy.
  • ographchronographHe wore a pilot's chronograph capable of timing elapsed seconds to the hundredth.

Common mistakes

confusing "chronic" with "acute"
"chronic" = lasting more than three months or recurring frequently; "acute" = sudden onset, high intensity, usually short-lived

In medicine, "chronic" (chron- = time): a condition persisting for three months or more — chronic pain, chronic fatigue syndrome, chronic disease. "Acute" (Latin "acutus" = sharp): sudden, intense onset with a shorter course — acute appendicitis, acute pain. A chronic disease can have acute episodes (flare-ups). Spanish: crónico, agudo.

A trick to remember it

Chron- = time. Spanish equivalent "cron-": cronología (chronology), crónico (chronic), sincronizar (synchronize), anacronismo (anachronism), cronómetro (chronometer). The "ch" in chron- is always /k/, not /tʃ/ as in English "church."

Practise what you learned

Exercise 1 · Form the word

The professor arranged the historical events in ___ order, starting from 3000 BCE.

Hint: chron- + ological = ?

Exercise 2 · Pick the right one

What is the difference between "chronic" and "acute" pain?

Frequently asked questions

What does the prefix chron- mean in English?

The prefix chron- means "time": chronology, chronic, synchronize, anachronism, chronicle. In Spanish it usually maps to cron-.

How do you pronounce chron-?

The prefix chron- is pronounced /krɒn/. For example, "chronology".

Can you give an example of a word with chron-?

"ology" becomes "chronology". It is a typical example of the chron- prefix.

Other useful prefixes

  • geo-

    Signals relation to the Earth or geography: geography, geology, geometry, geothermal.

  • neo-

    Signals something new or a revival of something earlier: neologism, neoclassical, neonatal.

  • paleo-

    Means "ancient" or "primitive": paleontology, Paleolithic, Paleocene, paleoanthropology.

Learn every English prefix

un-, re-, pre-, dis-, over-, in-... every beginning you need to unlock thousands of English words at once.

View all prefixes
SpeakUP Academy

Aprende

  • Lecciones gratis
  • Test de nivel
  • Glosario
  • Falsos amigos

SpeakUP

  • Nosotros
  • Iniciar sesión

Legal

  • Términos
  • Privacidad
© 2026 SpeakUP Academy. Todos los derechos reservados.