The word "s borer" is written in a peculiar way as it contains the silent letter "s". The correct phonetic transcription of this word is /ɛs bɔːrə/. The "s" before "borer" has no sound, so it does not affect the pronunciation of the word. The spelling of "s borer" can be confusing for non-native English speakers as the "s" seems to have no purpose. However, it is an exception to the pattern of English phonetics and is therefore important to remember.