There are a lot of other prefixes. Some of them are:
ð ɛ ɹ ɑ ɹ WORD_BOUNDARY ʌ WORD_BOUNDARY l ɑ t WORD_BOUNDARY ʌ v WORD_BOUNDARY ʌ ð ə ɹ WORD_BOUNDARY p ɹ iː f ɪ k s ɪ z WORD_BOUNDARY s ʌ m WORD_BOUNDARY ʌ v WORD_BOUNDARY ð ɛ m WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY