fetiferous
Producing young; fruitful, productive.
rare
[…]all the treasury of those ideal signatures, which […] became existent in the matrix or womb of that generative and faetiferous word, from whence sprung up the wonderful, numerous and various seminal natures[…]
Where it comes from
From Latin fētifer (“causing fruitfulness”) + -ous, from fētus (“pregnant, fruitful”) + -fer (“bearing, carrying, bringing”).
Adapted from the Wiktionary entry fetiferous (CC BY-SA 4.0).