The spelling of the word "re flexest" is peculiar, as it contains the suffix "-est" and the prefix "re-" in the middle of the word. To understand the phonetic transcription of this word, we must break it down. "Re-" is pronounced /riː/, and "flex" is pronounced /flɛks/. The suffix "-est" is pronounced /ɛst/. Therefore, the correct phonetic transcription of "re flexest" is /riː flɛkst/. This word is infrequently used in modern English, and the more common spelling is "reflexes."