An Etymological Dictionary of Astronomy and Astrophysics

To burn suddenly and violently with great heat and intense light. → deflagration.

Etymology (EN): From L. deflagratus, p.p. of deflagrare “to burn down,” from → de- + flag(rare) “to blaze, glow, burn” (L. fulgur “lightning;” PIE *bhleg- “to shine;” cf. Gk. phlegein “to burn, scorch,” Skt. bhárgas- “radiance, lustre, splendour,” O.E. blæc “black”) + -atus “-ate”

Etymology (PE): Taškaftidan, from taš “fire,” variant of âtaš→ fire + kaftidan “to explode,” → explode.