The spelling of the word "most ceased" is straightforward if you understand the International Phonetic Alphabet (IPA). Most is spelled with the letter 'o' and the vowel sound /əʊ/, which is the diphthong of /o/ and /ʊ/. Ceased ends with 'ed,' which is pronounced as /t/ after voiceless consonants like 'c' and as /d/ after voiced consonants like 'm.' The 'e' between the consonants 'c' and 's' is silent. Therefore, "most ceased" is pronounced as /məʊst sɪst/.
The phrase "most ceased" does not have a specific etymology, as it is a combination of two separate words: "most" and "ceased".
"Most" is derived from the Old English word "mest", which meant "most, the greatest". It has its roots in the Germanic word "mestaz" or "maistaz", which has a similar meaning.
"On the other hand, "ceased" comes from the Middle English word "cessen", which means "to stop, to desist". This word can be traced back to the Old French word "cesser" and the Latin word "cessare", both having the same meaning.
When combined, "most ceased" refers to something that has stopped or ended to the greatest extent or extent possible. However, it is important to note that the phrase "most ceased" is not commonly used as a standalone term in the English language.