Very beginning, informally: Hyph

• Square one, slangily
• Outset, slangily
• Very beginning, slangily
• Beginning, informally
• Very beginning, so to speak
• First moment
• Time to tuck into scrambled egg - and nothing more - first thing
• Beginning, so to speak
• Outset, so to speak

Wiktionary Word definitions in Wiktionary
n. (alternative spelling of get-go English)