Looking for a single word derived form word like 'temporal', that would described event that has unspecified time of occurrence.

First thought was 'temporamental', but looks like it's not an actual word. The analogue word for a spatially undefined event that reads similarly should also exist.

I've read this in a scientific paper but can't recollect where.

  • Hi Fyga, do you actually mean 'time' or rather the 'duration' of an event?
    – Joachim
    Jan 14, 2023 at 11:39
  • 2
    "Atemporal" means independent of time. Not exactly what you asked for, so not an answer but maybe close enough to be helpful.
    – Peter
    Jan 14, 2023 at 12:22
  • Can you provide more context, details, why the time/location is unspecified, what kind of range? A term from physics for an event at an arbitrary point in spacetime is very different to a word for a meeting where the time or venue haven't been agreed. Even within science, terminology in physics and paleontology is very different.
    – Stuart F
    Jan 14, 2023 at 13:47
  • This may be jargon from a particular branch of science. Do you recall the branch, or have your tried cross-posting to a science board?
    – jimm101
    Jan 15, 2023 at 2:03
  • Can you give examples of how you would use this word in sentences?
    – Barmar
    Jan 16, 2023 at 23:39

3 Answers 3


This may not suit your particular use case, but if you have an approximate sense of when a historical event happened, but it is very inexact, you could use the preposition circa, defined by Merriam-Webster as:

at approximately, in approximately, or of approximately—used especially with dates

An example would be: "he died circa 300 BC."

  • Approximate is not the same as unspecified.
    – Barmar
    Jan 16, 2023 at 23:39

Perhaps you are looking for a word like "ephemeral" which means short-lived, or temporary.

As for a similar word with respect to a "spatial" application, perhaps the word "peripheral" would be what you had in mind--which means something is taking place in the margins or edges of a place, and/or is of minor importance.


Diachronic carries the sense 'occurring over time rather than at a specified point in time':

diachronic ... Occurring over or changing with time.


It derives from the Greek rather than the Latin.

Wikipedia has (bolding mine):

Synchrony and diachrony are two complementary viewpoints in linguistic analysis. A synchronic approach (from Ancient Greek: συν- "together" and χρόνος "time") considers a language at a moment in time without taking its history into account. Synchronic linguistics aims at describing a language at a specific point of time, often the present. In contrast, a diachronic (from δια- "through" and χρόνος "time") approach, as in historical linguistics, considers the development and evolution of a language through history.

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