The word "plumbean" is spelled with the letters P-L-U-M-B-E-A-N. Its IPA phonetic transcription is /ˈplʌmbiːn/. The first syllable sounds like "plum" with a short /ʌ/ vowel sound, and the second syllable has a long /i:/ vowel sound like "be" followed by the consonant sound /n/. The letter "b" in the word represents a voiced bilabial plosive sound, and the letter "ea" represents the long vowel sound /i:/. Overall, the spelling accurately represents the pronunciation of the word.
Consisting of or resembling lead; leaden; dull; stupid.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.