The spelling of the word "most oldish" is quite straightforward once you understand the pronunciation. The word "most" is pronounced as /moʊst/, with a long "o" sound followed by a "st" consonant cluster. The word "oldish" is pronounced as /ˈoʊldɪʃ/, with a long "o" and a "d" sound followed by an "ish" suffix. When these two words are combined, the result is "most oldish", pronounced as /moʊst ˈoʊldɪʃ/. This is a relatively uncommon term, but it essentially means "very old-fashioned" or "somewhat dated."
There doesn't seem to be a widely recognized phrase or term called "most oldish" in the English language. The term "oldish" is an adjective used to describe something or someone who is somewhat old in comparison to others but not necessarily very old. However, if we were to create a definition for "most oldish" based on the components of the phrase, it could possibly mean the highest or most extreme level of being somewhat old or aged.
In this context, "most oldish" would imply that the subject being referenced is the most advanced in age among other things that are considered somewhat old. For example, if discussing a group of antique cars, "the car that is the most oldish" would refer to the vehicle that is the most aged amongst the others but not necessarily the oldest overall.
It is essential to remember that "most oldish" is not an established term in the English language, and its meaning can have variations depending on the context where it is being used. Hence, the above interpretation is mainly speculative and should be used with caution, as there may be different interpretations based on different contexts or uses.
The phrase "most oldish" is not a word with a specific etymology. "Oldish" is a combination of the root word "old" and the suffix "-ish", which is commonly used to indicate approximation or similarity. By adding "-ish" to "old", the word "oldish" implies that something or someone is somewhat old or exhibits characteristics of being old. However, the inclusion of "most" before "oldish" seems peculiar and could possibly be a spontaneous formation or an individualized usage.