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Related to drill in: drill into
drill in(to) (something)
1. Literally, to bore into or pierce something. Unfortunately, we need to drill into the ground to try to find the burst pipe.
2. To use repetition to learn something. In this usage, a noun or pronoun is used between "drill" and "in." My friend and I drilled each other in irregular French verbs before the test.
drill someone in something
to give someone practice in something. Now, I am going to drill you in irregular verbs. The teacher drilled the students in the use of the passive.
drill in (to something)
to bore into or penetrate something. The worker drilled into the wall in three places. Please don't drill into the wall here, where it will show.