The word "most nubilous" is spelled with a silent 'b' in the second syllable. The IPA phonetic transcription for this word is /moʊst ˈnjuːbɪləs/. The 'b' in 'nubilous' is not pronounced, and instead the stress is placed on the first syllable 'nu' followed by the schwa sound in the second syllable 'bi'. 'Most' is pronounced with a long 'o' sound and a soft 'st' at the end, making it sound like 'moust'. Together, the word means very cloudy or foggy.
The word "nubilous" has its origin in the Latin term "nūbilus", which means "cloudy" or "full of clouds". The Latin word "nūbilus" itself comes from the noun "nūbēs", meaning "cloud". The term "most nubilous" is an English phrase that combines the adjective "most" with the word "nubilous". The word "most" intensifies the meaning of "nubilous", emphasizing the degree of cloudiness or the presence of clouds. So, "most nubilous" can be understood as extremely cloudy or very full of clouds.