1º_ It is related to the head, and from this concept the meanings of "main, most important", "geographical and political place as head of a region" are created, "outstanding or essential in an item or activity". From the Latin caput, itis ("head"). 2º_ Although also related to the previous one, there are several meanings for the economic field such as "patrimony", "goods that generate interest or profits in an investment", "census or tribute on a farm". 3º_ In typography it is said of the letter in capital letter.
Capital: that can emit concepts or ideas. On the head. Body or part of it which provides a database with interference in its Constitution. Seat memory or registers. Head principal of the public administration on the political map. Extreme trial or wickedness. Penalty-: death sentence. Sin-: transgression causing indignity.