The spelling of the word "were advantage" is in accordance with the generally accepted rules of English orthography. The word "were" is pronounced /wɜːr/, with the vowel sound represented by the IPA symbol ɜː, which is also known as the "nurse" vowel. The word "advantage" is pronounced /ədˈvæntɪdʒ/, with the schwa sound represented by the IPA symbol ə. This spelling of the word "were advantage" is commonly used in English to indicate a situation where a particular advantage was present in the past.
The term "were advantage" is not a commonly used phrase in English, and it does not have a specific etymology. seems like a combination of two separate words: "were" and "advantage".
"Advantage" originated from the Old French word "avantage", which came from the Latin phrase "ad-" meaning "to" and "vantus" meaning "to advance or proceed". This verb form evolved in meaning over time and eventually came to refer to a favorable circumstance or benefit.
On the other hand, "were" is the second person singular and plural past tense of the verb "be". originated from the Old English word "wǣre" and has been used in various forms, such as "we/art/were/was".
However, the combination of "were advantage" is not a standard phrase or term in the English language, so it does not have a well-established etymology.