PIE base ‘to produce, procure’. Possibly related to *perə-² ‘to grant, allot’. See also PIE base *genə- ‘to give birth, bear, beget, produce, generate’, root of nature, kind, etc., and *kʷei- ‘to pile up, build, make’, root of poet and autopoiesis ‘self-creating’.
Other derivatives include parade, parry, emperor, parachute, sever, parent, and puerperal.
Pokorny *per-2 D. ‘to bear (child)’, p. 818.]