Antonyms of adj depletable

1 sense of depletable

Sense 1
depletable -- (capable of being depleted)

INDIRECT (VIA exhaustible) -> inexhaustible -- (incapable of being entirely consumed or used up; "an inexhaustible supply of coal")

Similarity of adj depletable

1 sense of depletable

Sense 1
depletable -- (capable of being depleted)
       => exhaustible (vs. inexhaustible) -- (capable of being used up)