The spelling of the word "PRRMS OC" can be explained using the International Phonetic Alphabet (IPA) transcription. The first four letters, "PRRM," can be transcribed as /prʌrm/, with the sound "r" being slightly rolled or trilled. The last two letters, "OC," can be transcribed as /ɒk/, with the "o" sound being pronounced as in "got." In summary, "PRRMS OC" can be phonetically transcribed as /prʌrmɒk/.