(blasting) To plug up with clay, earth, dry sand, sod, or other material, as a hole bored in a rock.
To drive in or pack down by frequent gentle strokes
Tamp earth so as to make a smooth place.
To reduce the intensity of.
Pounded hard
Packed down
1957: whose floor was of tamped earth — Lawrence Durrell, Justine, p.85 (Faber)