The correct spelling of the phrase "more quailing" may seem somewhat puzzling when analyzed through the lens of phonetics. The word "quailing" is pronounced as /ˈkweɪ.lɪŋ/, with a diphthong "ai" sound representing the "a" and "i" sounds. Therefore, the spelling of "quailing" makes sense. However, the addition of "more" can lead to confusion as the "o" sound can be represented by different letters. Nonetheless, "more quailing" is correctly spelled and pronounced /mɔːr ˈkweɪ.lɪŋ/, with the "o" sound pronounced as in "more" (not like in "morn").
The phrase "more quailing" does not have a specific etymology, as it is a combination of two words. However, I can provide the etymology for each individual word:
1. More: The word "more" originated from the Old English word "māra", which means greater in quantity, amount, or degree. It shares its roots with other Germanic languages, such as Old Frisian "mār", Old Saxon "mēr", and Old High German "mēr".
2. Quailing: The word "quailing" is derived from the verb "quail". It is originally from the Middle English word "quaile", which comes from Old English "cwelan", meaning to die, perish, or fade away. In this context, "quailing" is used as the present participle form of the verb.