Pronounced: PAR-lee, verb or noun
Notes: This is another word I thought I knew until I read the definition
The word coeval means “of the same age, antiquity, or duration”
This word comes from Latin coaevus (of the same age), which is itself made up of co- (in or to the same degree) and aevum (age or lifetime). As a side note, aevum is also the source of longevity and primeval. Coeval is usually referred to things that have existed together for a long time – for example, the planets in our solar system, or it can refer to things that co-existed a long(ish) time ago: manuscripts can be described as “coeval”.
This word began to be used around 1600