"کل" is an Arabic word that translates to "all" or "every" in English. It is commonly used in various contexts to indicate totality or completeness. For example, in phrases like "کل الناس" (all people), it emphasizes inclusiveness. In Persian, "کل" also means "yesterday." It is used in everyday conversation to refer to the day before today. For instance, one might say "من دیروز به بازار رفتم" (I went to the market yesterday), using "کل" to denote the previous day.