The word "serpented" is spelled with the IPA phonetic transcription /sɜrpəntɪd/. This word is formed from the base word "serpent" with the addition of the past tense suffix "-ed". The stress is on the second syllable, and the vowel sound in the first syllable is a schwa. The "-nt-" cluster in the middle of the word is pronounced with a flap/tap sound /ɾ/, and the second syllable ends with the "-id" sound /ɪd/. Overall, "serpented" is a regular formation in English spelling and pronunciation.