Etymology:
The word "thirties" originates from the Old English word "þrītig," which ultimately derives from the Proto-Indo-European root "*tri-," meaning "three."
Meaning:
"Thirties" refers to the period of time between the ages of 30 and 39, inclusive. It is commonly used as a noun, but can also be used as an adjective to describe people or things belonging to this age group.
Origin:
The concept of dividing time into decades, including the "thirties," can be traced back to ancient cultures. The early Egyptians used a base-10 system to measure time, with a decade representing a period of 10 years.
In the Roman calendar, the "thirties" was known as "post-tricennium" or "post-tricesimum annum," literally meaning "after the third year" or "after the thirtieth year." This term was used to refer to the period of time after a person reached the age of 30, which was considered the age of maturity in Roman society.
The term "thirties" in its modern sense became common in English during the Middle Ages. It was initially used to describe the age group of individuals between 30 and 40, but over time, the usage shifted to refer specifically to the period between 30 and 39.
Etymology The word thirty comes from the Old English word þrītig pronounced thri
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