打孔

打孔	dǎ kǒng	to punch a hole
打	dá	dozen (loanword)
打	dǎ	to beat / to strike / to hit / to break / to type / to mix up / to build / to fight / to fetch / to make / to tie up / to issue / to shoot / to calculate / to play (a game) / since / from
孔	Kǒng	surname Kong
孔	kǒng	hole / CL:个 / classifier for cave dwellings