What is the X in X-mas?
word-forming element meaning "bearing, producing," from Latin -parus (e.g. viviparus "bringing forth young alive"), from parere "to produce, bring forth" (see pare).
parous par·ous (pār'əs, pâr'-)adj. Having given birth one or more times.
-parous suff. Giving birth to; producing: multiparous.