The story
Origin uncertain. Perhaps from earlier dialectal scramble, scrammel (“to collect or rake together with the hands”), from scramb (“to pull or scrape together with the hands”) + -le (frequentative suffix) (compare Dutch schrammen (“to graze, brush, scratch”)); or alternatively from a nasalised form of scrabble (“to scrape or scratch quickly”).
Etymology from Wiktionary, CC BY-SA 4.0.