Pronunciation: [mˈə͡ʊst sˈʌdənli] (IPA) 
The correct spelling for "most suddenly" is actually "most suddenly". The reason for this is because the word "suddenly" ends in a consonant sound, not a vowel sound. When adding the suffix "-ly" to a word that ends in a consonant sound, you simply add "-ly" without changing the spelling of the original word. In IPA phonetic transcription, "most suddenly" would be transcribed as /məʊst ˈsʌdənli/.
Most suddenly is an adverbial phrase that is used to describe an action or event that occurs in a very sudden or abrupt manner, displaying a high degree of unexpectedness and rapidity. It emphasizes the exceptional or unparalleled suddenness of the action or event being described.
The word "most" used in this context is an intensive adverb, intensifying the degree or extent of the suddenness. It signifies that the action or event being described is characterized by an extreme degree of suddenness, surpassing others in terms of its abruptness.
"Suddenly" is an adverb that indicates an immediate or unexpected occurrence. It implies that something happens quickly and without any prior warning or anticipation.
When used together, "most suddenly" amplifies the effect of suddenness and gives prominence to the fact that the action or event being described takes place in an exceptionally rapid and unforeseen manner. It underscores the element of surprise and catches attention due to its particular intensity, making the suddenness of the action or event more pronounced and remarkable.
Overall, "most suddenly" serves as an intensified expression denoting extreme abruptness and speed, highlighting the extraordinary nature of an action or event that occurs without warning or expectation.
The phrase "most suddenly" is not a word with its own etymology. However, we can analyze the etymology of its constituents separately:
1. Most: In this context, "most" is used as an intensifier meaning "very" or "extremely". Its origin can be traced back to Old English "mǣst", which means "greatest" or "highest degree".
2. Suddenly: The word "suddenly" has its roots in Middle English. It is derived from the Old French "soudain", which means "immediate" or "hasty". The Old French term can be further traced to the Latin word "subitāneus", which has a similar meaning.
When combined, "most suddenly" emphasizes the rapidness or unexpectedness of an action or event.
