Fiat comes from Latin fiat ('let it be done'), third-person singular present subjunctive of fieri ('to be made, become, happen'), used as the passive of facere ('to make, do'). The development is chiefly a borrowing or learned continuation, carrying an older form and meaning into English rather than building the word from a purely native base. In present use, it is used as a noun meaning "an authoritative decree or order issued without consent", so the historical material remains connected with the current sense rather than standing as bare ancestry. The named historical forms include Latin fiat and Latin fieri, keeping the history tied to concrete forms rather than a loose resemblance. Its semantic neighborhood includes decree, edict, order, and command, locating the modern specialization without adding a new origin story.