The spelling of the word "wert disagreeable" may appear confusing to some, but it follows the rules of Early Modern English. "Wert" is an archaic form of "were" used in the second person singular. "Disagreeable" is spelled with "g" because it comes from the French word "desagreable" and the "g" is pronounced as /ɡ/ in IPA. So the correct pronunciation of "wert disagreeable" is /wərt dɪsəˈɡriːəbl/. Although it may look intimidating, understanding the phonetic transcription can make the spelling of this word more accessible.
The phrase "wert disagreeable" is not a single word with an established etymology. Instead, it is a combination of two separate words: "wert" and "disagreeable".
1. "Wert": "Wert" is an archaic second-person singular past tense form of the verb "to be". It is derived from Old English "wǣre", which meant "to be" and was used in Proto-Germanic languages. Over time, this form gradually fell out of use, and the modern English equivalent is "were". The phrase "wert disagreeable" corresponds to the past tense of "you were disagreeable".
2. "Disagreeable": The word "disagreeable" dates back to the 15th century and has Latin roots.