The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
pezd-
DEFINITION:
To fart. 1. Suffixed form *pezd-i-.feist, from Old English fsting, a breaking wind, and Middle English fisten, to fart, from Germanic *fistiz, a fart. 2.petard, from Latin pdere, to fart. 3. Perhaps Latin pdis, louse (? < foul-smelling insect): pedicular. (Pokorny pezd- 829, 2. peis- 796.) Compare perd-.