Drilling
Drilling , noun
1.
The act of piercing with a drill.
2.
A training by repeated exercises.
Drilling , noun
The act of using a drill in sowing seeds.
Drilling , noun
[German drillich, from Latin trilix having three threads, from the of tres three + licium a thread of the warm. See Three, and compare Twill.]
(Manufacturing) A heavy, twilled fabric of linen or cotton.