Fecund
Etymology
From Latin "fecundus" ("fruitful"), from an ancient root "*fe-" meaning "to produce or yield," also behind "fetus," "female," and "felicity."
adjective · /FEK-und/
Highly fertile; capable of producing abundant offspring, growth, or ideas.
What it names
It gives a forceful word for teeming fertility — of soil, of creatures, or of a fertile imagination.
Example
The delta’s fecund mud yielded three harvests a year.
Related idea
Fecund land is bursting with growth; fallow land is deliberately rested and left unsown to recover.