. "Any process that stops, prevents, or reduces the frequency, rate or extent of the formation of a flagellum." . . . "negative regulation of flagellum assembly" . "down regulation of flagellum assembly" . "down-regulation of flagellum assembly" . "downregulation of flagellum assembly" . "inhibition of flagellum assembly" . "negative regulation of flagella assembly" . "negative regulation of flagellum biogenesis" . . .