expression, godan verb (-tsu)
pierce a hole; drill a hole
Literal expression meaning to make a hole in something, often with a tool.
壁に孔を穿ってケーブルを通した。
I drilled a hole in the wall and passed the cable through.
Compound of 孔 (ana, 'hole') + を (wo, object marker) + 穿つ (ugatsu, 'to pierce, drill').