Spelling in O’Neill, who explains that "the pressure on the bag to expel the air is exerted by the forearms or wrists - hence, "cuisle", or pulse"; According to Flood, who refers to the 5th century "Brehon laws", Cuisle is the modern form of the old Irish Cusle, which means "the pulsing of the artery in the wrist, but primarily the vein, a blood-vessel, hence a pipe"; Podnos, who fails to reveal his source, calls the instrument just Cuisle, considering it a "questionable Celtic" term; NB: ➺ Cuisli pipes.