The phrase "grubbed up" refers to digging up or removing plants, roots, or other objects from the ground. Antonyms, or opposite words, for this term would include "planting," "sowing," "cultivating," "growing," or "nurturing." These words all have positive connotations associated with planting and caring for plants, rather than removing them. other antonyms could be "conserving," "preserving," or "protecting," which implies protecting plants from being removed or destroyed. Essentially, the opposite of "grubbed up" could be any term that refers to the act of tending, growing, or preserving plants or other natural elements in the environment.