fart: [OE] Fart is a widespread and ancient word in the Indo-European languages, and goes back to a prehistoric Indo-European *perd-, which may originally have been an imitation of the sound of a fart. Its other offspring besides fart include German farzen and furzen, Swedish fjärta, Danish fjerte, Russian perdet’, Polish pierdzieć, Greek pordízō, and Welsh rhechain.
Old English feortan, ultimately from PIE *perd- (cognates: Old High German ferzan, Old Norse freta, Danish fjerte, Sanskrit pard, Greek perdein, Lithuanian perdzu, Russian perdet), of imitative origin. Related: Farted; farting. As a noun, from late 14c.
Clatterer or clatterfart, which wyl disclose anye light secreate. [Richard Huloet, "Abecedarium Anglo-Latinum," 1552]