The word "OIYN" is a tricky one when it comes to spelling. In terms of IPA phonetic transcription, it can be broken down as "ɔɪn". The first sound "ɔɪ" represents a dipthong, which combines the sounds of "aw" and "ee". The "n" sound is straightforward. This word may not be commonly used in English language, but understanding phonetic transcription can help in better enunciation of words.