spargo.

Disputed. Often derived from the zero-grade of Proto-Indo-European *sperh₂g- and connected with Ancient Greek σφαραγέομαι (spharagéomai, “to hiss, crackle”), Sanskrit स्फूर्जति (sphūrjati, “to roar, thunder”), Old Norse spraka (“to crackle”), and Lithuanian spὶrgti (“to hiss”), from which Proto-Indo-European *spregʰ- has been reconstructed. However, De Vaan doubts this etymology, arguing that the semantics are unconvincing and that, phonologically, *CrHC should yield *CrāC in Latin. Instead, Schrijver and De Vaan suggests that the term may derive from a g-extension to the root *sper- (“to scatter, strew”), whence also perhaps Ancient Greek σπείρω (speírō).