Impregnaria

The story follows Elara, a young alchemist who had spent her life studying the "Void Arts"—the science of how emptiness takes shape. In her world, the lands were barren; the Great Drying had turned fields to dust and hope to ash. Legends spoke of a valley where the soil was so rich, so saturated with the essence of life, that simply walking upon it with a strong enough desire could cause that desire to bloom into reality.

However, words often sound like other existing terms. You might have been thinking of (a biological process), Impregilo (an Italian construction group), or perhaps the adjective Impregnable (meaning unconquerable). impregnaria