The spelling of the word "RTORTN" doesn't follow traditional English phonetic rules. It appears to be a made-up word with no clear meaning. Its phonetic transcription is /ɑːtɔːtn/, with the "R" being pronounced in a British accent. The "T" sounds are sharp and the "N" sound at the end is voiced. The lack of vowels in this word makes it an unusual spelling, but it's not uncommon to see such anomalies in modern language.