The word "prolling" is not a commonly used word, and its spelling can be quite tricky. In IPA phonetic transcription, "prolling" would be spelled /ˈprəʊlɪŋ/. The first syllable is pronounced as "proh," with a short o sound followed by an "h" sound. The second syllable is pronounced as "ling," with a long i sound followed by an "ng" sound. Despite its unusual spelling, "prolling" is sometimes used to describe the act of leisurely wandering or meandering around a particular location.
There is no widely recognized word "Prolling" in the English language. It seems to be a term that doesn't have an established etymology as it is likely a misspelling or a made-up word. However, if you intended to ask about the word "Patrolling", then its etymology can be traced back to the Middle French word "patrouiller" meaning "to patrol". It was derived from the Old French word "patróuil", which meant "a small detachment of soldiers". The etymology of "patrouiller" is uncertain, but it is believed to have Germanic origins, possibly from the word "patrullōnaz", meaning "to walk back and forth".