The word "testmoigne" is an archaic variant of the word "testimony", meaning a statement given under oath or affirmation. Its spelling may seem peculiar, but it follows the English language's rich history of changes in phonetics and orthography. The IPA phonetic transcription of the word would be /tɛstmɔɪn/. It is pronounced with a short e sound in the first syllable, followed by the combination of "st" and "m" in the second syllable, and ending with a diphthong of "oi" and "n" sound in the final syllable.