| Rating | Solver | Clue |
|---|---|---|
| PERMEATE | Percolate through | |
| OOZE | Percolate through pores | |
| SILT | To flow through crevices; to percolate. | |
| FILTER | To pass through a filter; to percolate. | |
| SICKER | To percolate, trickle, or ooze, as water through a crack. | |
| STRAIN | To percolate; to be filtered; as, water straining through a sandy soil. | |
| UNDERDRAIN | An underground drain or trench with openings through which the water may percolate from the soil or ground above. | |