Pronunciation: [jˈi͡əz ɐɡˈə͡ʊz] (IPA) 
The correct spelling of the phrase "years agos" is actually "years ago". The IPA phonetic transcription for "years ago" is /jɪrz əˈɡoʊ/. The confusion in spelling "agos" instead of "ago" may arise due to the way "ago" is pronounced in certain dialects or accents, where the final "-o" sound may sound more like an "-os" sound. However, in standard English, the correct spelling is "years ago".
"Years ago" is not a single word, but a phrase in the English language. Its etymology can be broken down as follows:
"Years": The word "years" originated from Old English "gear", which is of Germanic origin. It is related to the Dutch "jaar" and German "Jahr". The word has Indo-European roots, likely stemming from the Proto-Indo-European base *yer- meaning "year".
"Ago": The term "ago" comes from Middle English "agone" or "agon", which means "gone by". It can be traced back to the Old English word "agān", which translates to "passed away". The base of the word can be connected to the Proto-Germanic root *agon, meaning "away".
When combined, "years ago" simply refers to a period of time in the past that is measured in years.
